[llvm] r308986 - [X86][CGP] Reduce memcmp() expansion to 2 load pairs (PR33914)

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Tue Jul 25 10:04:37 2017
New Revision: 308986

URL: http://llvm.org/viewvc/llvm-project?rev=308986&view=rev
Log:
[X86][CGP] Reduce memcmp() expansion to 2 load pairs (PR33914)

D35067/rL308322 attempted to support up to 4 load pairs for memcmp inlining which resulted in regressions for some optimized libc memcmp implementations (PR33914).

Until we can match these more optimal cases, this patch reduces the memcmp expansion to a maximum of 2 load pairs (which matches what we do for -Os).

This patch should be considered for the 5.0.0 release branch as well

Differential Revision: https://reviews.llvm.org/D35830

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
    llvm/trunk/test/CodeGen/X86/memcmp.ll
    llvm/trunk/test/Transforms/CodeGenPrepare/X86/memcmp.ll

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=308986&r1=308985&r2=308986&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Tue Jul 25 10:04:37 2017
@@ -1672,8 +1672,8 @@ X86TargetLowering::X86TargetLowering(con
 
   // TODO: These control memcmp expansion in CGP and could be raised higher, but
   // that needs to benchmarked and balanced with the potential use of vector
-  // load/store types (PR33329).
-  MaxLoadsPerMemcmp = 4;
+  // load/store types (PR33329, PR33914).
+  MaxLoadsPerMemcmp = 2;
   MaxLoadsPerMemcmpOptSize = 2;
 
   // Set loop alignment to 2^ExperimentalPrefLoopAlignment bytes (default: 2^4).

Modified: llvm/trunk/test/CodeGen/X86/memcmp.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/memcmp.ll?rev=308986&r1=308985&r2=308986&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/memcmp.ll (original)
+++ llvm/trunk/test/CodeGen/X86/memcmp.ll Tue Jul 25 10:04:37 2017
@@ -475,25 +475,14 @@ define i1 @length8_eq_const(i8* %X) noun
 
 define i1 @length12_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length12_eq:
-; X86:       # BB#0: # %loadbb
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
-; X86-NEXT:    movl (%ecx), %edx
-; X86-NEXT:    cmpl (%eax), %edx
-; X86-NEXT:    jne .LBB14_1
-; X86-NEXT:  # BB#2: # %loadbb1
-; X86-NEXT:    movl 4(%ecx), %edx
-; X86-NEXT:    cmpl 4(%eax), %edx
-; X86-NEXT:    jne .LBB14_1
-; X86-NEXT:  # BB#3: # %loadbb2
-; X86-NEXT:    movl 8(%ecx), %edx
-; X86-NEXT:    xorl %ecx, %ecx
-; X86-NEXT:    cmpl 8(%eax), %edx
-; X86-NEXT:    je .LBB14_4
-; X86-NEXT:  .LBB14_1: # %res_block
-; X86-NEXT:    movl $1, %ecx
-; X86-NEXT:  .LBB14_4: # %endblock
-; X86-NEXT:    testl %ecx, %ecx
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $12
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
+; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
@@ -520,40 +509,13 @@ define i1 @length12_eq(i8* %X, i8* %Y) n
 
 define i32 @length12(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length12:
-; X86:       # BB#0: # %loadbb
-; X86-NEXT:    pushl %esi
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
-; X86-NEXT:    movl (%esi), %ecx
-; X86-NEXT:    movl (%eax), %edx
-; X86-NEXT:    bswapl %ecx
-; X86-NEXT:    bswapl %edx
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    jne .LBB15_1
-; X86-NEXT:  # BB#2: # %loadbb1
-; X86-NEXT:    movl 4(%esi), %ecx
-; X86-NEXT:    movl 4(%eax), %edx
-; X86-NEXT:    bswapl %ecx
-; X86-NEXT:    bswapl %edx
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    jne .LBB15_1
-; X86-NEXT:  # BB#3: # %loadbb2
-; X86-NEXT:    movl 8(%esi), %ecx
-; X86-NEXT:    movl 8(%eax), %edx
-; X86-NEXT:    bswapl %ecx
-; X86-NEXT:    bswapl %edx
-; X86-NEXT:    xorl %eax, %eax
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    jne .LBB15_1
-; X86-NEXT:  # BB#4: # %endblock
-; X86-NEXT:    popl %esi
-; X86-NEXT:    retl
-; X86-NEXT:  .LBB15_1: # %res_block
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    movl $-1, %ecx
-; X86-NEXT:    movl $1, %eax
-; X86-NEXT:    cmovbl %ecx, %eax
-; X86-NEXT:    popl %esi
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $12
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length12:
@@ -588,47 +550,13 @@ define i32 @length12(i8* %X, i8* %Y) nou
 
 define i32 @length16(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length16:
-; X86:       # BB#0: # %loadbb
-; X86-NEXT:    pushl %esi
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
-; X86-NEXT:    movl (%esi), %ecx
-; X86-NEXT:    movl (%eax), %edx
-; X86-NEXT:    bswapl %ecx
-; X86-NEXT:    bswapl %edx
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    jne .LBB16_1
-; X86-NEXT:  # BB#2: # %loadbb1
-; X86-NEXT:    movl 4(%esi), %ecx
-; X86-NEXT:    movl 4(%eax), %edx
-; X86-NEXT:    bswapl %ecx
-; X86-NEXT:    bswapl %edx
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    jne .LBB16_1
-; X86-NEXT:  # BB#3: # %loadbb2
-; X86-NEXT:    movl 8(%esi), %ecx
-; X86-NEXT:    movl 8(%eax), %edx
-; X86-NEXT:    bswapl %ecx
-; X86-NEXT:    bswapl %edx
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    jne .LBB16_1
-; X86-NEXT:  # BB#4: # %loadbb3
-; X86-NEXT:    movl 12(%esi), %ecx
-; X86-NEXT:    movl 12(%eax), %edx
-; X86-NEXT:    bswapl %ecx
-; X86-NEXT:    bswapl %edx
-; X86-NEXT:    xorl %eax, %eax
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    jne .LBB16_1
-; X86-NEXT:  # BB#5: # %endblock
-; X86-NEXT:    popl %esi
-; X86-NEXT:    retl
-; X86-NEXT:  .LBB16_1: # %res_block
-; X86-NEXT:    cmpl %edx, %ecx
-; X86-NEXT:    movl $-1, %ecx
-; X86-NEXT:    movl $1, %eax
-; X86-NEXT:    cmovbl %ecx, %eax
-; X86-NEXT:    popl %esi
+; X86:       # BB#0:
+; X86-NEXT:    pushl $0
+; X86-NEXT:    pushl $16
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NEXT:    calll memcmp
+; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length16:
@@ -660,32 +588,29 @@ define i32 @length16(i8* %X, i8* %Y) nou
 }
 
 define i1 @length16_eq(i8* %x, i8* %y) nounwind {
-; X86-LABEL: length16_eq:
-; X86:       # BB#0: # %loadbb
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
-; X86-NEXT:    movl (%ecx), %edx
-; X86-NEXT:    cmpl (%eax), %edx
-; X86-NEXT:    jne .LBB17_1
-; X86-NEXT:  # BB#2: # %loadbb1
-; X86-NEXT:    movl 4(%ecx), %edx
-; X86-NEXT:    cmpl 4(%eax), %edx
-; X86-NEXT:    jne .LBB17_1
-; X86-NEXT:  # BB#3: # %loadbb2
-; X86-NEXT:    movl 8(%ecx), %edx
-; X86-NEXT:    cmpl 8(%eax), %edx
-; X86-NEXT:    jne .LBB17_1
-; X86-NEXT:  # BB#4: # %loadbb3
-; X86-NEXT:    movl 12(%ecx), %edx
-; X86-NEXT:    xorl %ecx, %ecx
-; X86-NEXT:    cmpl 12(%eax), %edx
-; X86-NEXT:    je .LBB17_5
-; X86-NEXT:  .LBB17_1: # %res_block
-; X86-NEXT:    movl $1, %ecx
-; X86-NEXT:  .LBB17_5: # %endblock
-; X86-NEXT:    testl %ecx, %ecx
-; X86-NEXT:    setne %al
-; X86-NEXT:    retl
+; X86-NOSSE-LABEL: length16_eq:
+; X86-NOSSE:       # BB#0:
+; X86-NOSSE-NEXT:    pushl $0
+; X86-NOSSE-NEXT:    pushl $16
+; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT:    calll memcmp
+; X86-NOSSE-NEXT:    addl $16, %esp
+; X86-NOSSE-NEXT:    testl %eax, %eax
+; X86-NOSSE-NEXT:    setne %al
+; X86-NOSSE-NEXT:    retl
+;
+; X86-SSE2-LABEL: length16_eq:
+; X86-SSE2:       # BB#0:
+; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
+; X86-SSE2-NEXT:    movdqu (%eax), %xmm1
+; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm1
+; X86-SSE2-NEXT:    pmovmskb %xmm1, %eax
+; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT:    setne %al
+; X86-SSE2-NEXT:    retl
 ;
 ; X64-LABEL: length16_eq:
 ; X64:       # BB#0: # %loadbb
@@ -709,27 +634,27 @@ define i1 @length16_eq(i8* %x, i8* %y) n
 }
 
 define i1 @length16_eq_const(i8* %X) nounwind {
-; X86-LABEL: length16_eq_const:
-; X86:       # BB#0: # %loadbb
-; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT:    cmpl $858927408, (%eax) # imm = 0x33323130
-; X86-NEXT:    jne .LBB18_1
-; X86-NEXT:  # BB#2: # %loadbb1
-; X86-NEXT:    cmpl $926299444, 4(%eax) # imm = 0x37363534
-; X86-NEXT:    jne .LBB18_1
-; X86-NEXT:  # BB#3: # %loadbb2
-; X86-NEXT:    cmpl $825243960, 8(%eax) # imm = 0x31303938
-; X86-NEXT:    jne .LBB18_1
-; X86-NEXT:  # BB#4: # %loadbb3
-; X86-NEXT:    xorl %ecx, %ecx
-; X86-NEXT:    cmpl $892613426, 12(%eax) # imm = 0x35343332
-; X86-NEXT:    je .LBB18_5
-; X86-NEXT:  .LBB18_1: # %res_block
-; X86-NEXT:    movl $1, %ecx
-; X86-NEXT:  .LBB18_5: # %endblock
-; X86-NEXT:    testl %ecx, %ecx
-; X86-NEXT:    sete %al
-; X86-NEXT:    retl
+; X86-NOSSE-LABEL: length16_eq_const:
+; X86-NOSSE:       # BB#0:
+; X86-NOSSE-NEXT:    pushl $0
+; X86-NOSSE-NEXT:    pushl $16
+; X86-NOSSE-NEXT:    pushl $.L.str
+; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT:    calll memcmp
+; X86-NOSSE-NEXT:    addl $16, %esp
+; X86-NOSSE-NEXT:    testl %eax, %eax
+; X86-NOSSE-NEXT:    sete %al
+; X86-NOSSE-NEXT:    retl
+;
+; X86-SSE2-LABEL: length16_eq_const:
+; X86-SSE2:       # BB#0:
+; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
+; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
+; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
+; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT:    sete %al
+; X86-SSE2-NEXT:    retl
 ;
 ; X64-LABEL: length16_eq_const:
 ; X64:       # BB#0: # %loadbb
@@ -766,36 +691,9 @@ define i32 @length24(i8* %X, i8* %Y) nou
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length24:
-; X64:       # BB#0: # %loadbb
-; X64-NEXT:    movq (%rdi), %rcx
-; X64-NEXT:    movq (%rsi), %rdx
-; X64-NEXT:    bswapq %rcx
-; X64-NEXT:    bswapq %rdx
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB19_1
-; X64-NEXT:  # BB#2: # %loadbb1
-; X64-NEXT:    movq 8(%rdi), %rcx
-; X64-NEXT:    movq 8(%rsi), %rdx
-; X64-NEXT:    bswapq %rcx
-; X64-NEXT:    bswapq %rdx
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB19_1
-; X64-NEXT:  # BB#3: # %loadbb2
-; X64-NEXT:    movq 16(%rdi), %rcx
-; X64-NEXT:    movq 16(%rsi), %rdx
-; X64-NEXT:    bswapq %rcx
-; X64-NEXT:    bswapq %rdx
-; X64-NEXT:    xorl %eax, %eax
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB19_1
-; X64-NEXT:  # BB#4: # %endblock
-; X64-NEXT:    retq
-; X64-NEXT:  .LBB19_1: # %res_block
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    movl $-1, %ecx
-; X64-NEXT:    movl $1, %eax
-; X64-NEXT:    cmovbl %ecx, %eax
-; X64-NEXT:    retq
+; X64:       # BB#0:
+; X64-NEXT:    movl $24, %edx
+; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 24) nounwind
   ret i32 %m
 }
@@ -814,24 +712,13 @@ define i1 @length24_eq(i8* %x, i8* %y) n
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length24_eq:
-; X64:       # BB#0: # %loadbb
-; X64-NEXT:    movq (%rdi), %rax
-; X64-NEXT:    cmpq (%rsi), %rax
-; X64-NEXT:    jne .LBB20_1
-; X64-NEXT:  # BB#2: # %loadbb1
-; X64-NEXT:    movq 8(%rdi), %rax
-; X64-NEXT:    cmpq 8(%rsi), %rax
-; X64-NEXT:    jne .LBB20_1
-; X64-NEXT:  # BB#3: # %loadbb2
-; X64-NEXT:    movq 16(%rdi), %rcx
-; X64-NEXT:    xorl %eax, %eax
-; X64-NEXT:    cmpq 16(%rsi), %rcx
-; X64-NEXT:    je .LBB20_4
-; X64-NEXT:  .LBB20_1: # %res_block
-; X64-NEXT:    movl $1, %eax
-; X64-NEXT:  .LBB20_4: # %endblock
+; X64:       # BB#0:
+; X64-NEXT:    pushq %rax
+; X64-NEXT:    movl $24, %edx
+; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
+; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
   %cmp = icmp eq i32 %call, 0
@@ -852,24 +739,14 @@ define i1 @length24_eq_const(i8* %X) nou
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length24_eq_const:
-; X64:       # BB#0: # %loadbb
-; X64-NEXT:    movabsq $3978425819141910832, %rax # imm = 0x3736353433323130
-; X64-NEXT:    cmpq %rax, (%rdi)
-; X64-NEXT:    jne .LBB21_1
-; X64-NEXT:  # BB#2: # %loadbb1
-; X64-NEXT:    movabsq $3833745473465760056, %rax # imm = 0x3534333231303938
-; X64-NEXT:    cmpq %rax, 8(%rdi)
-; X64-NEXT:    jne .LBB21_1
-; X64-NEXT:  # BB#3: # %loadbb2
-; X64-NEXT:    xorl %eax, %eax
-; X64-NEXT:    movabsq $3689065127958034230, %rcx # imm = 0x3332313039383736
-; X64-NEXT:    cmpq %rcx, 16(%rdi)
-; X64-NEXT:    je .LBB21_4
-; X64-NEXT:  .LBB21_1: # %res_block
-; X64-NEXT:    movl $1, %eax
-; X64-NEXT:  .LBB21_4: # %endblock
+; X64:       # BB#0:
+; X64-NEXT:    pushq %rax
+; X64-NEXT:    movl $.L.str, %esi
+; X64-NEXT:    movl $24, %edx
+; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setne %al
+; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 24) nounwind
   %c = icmp ne i32 %m, 0
@@ -888,43 +765,9 @@ define i32 @length32(i8* %X, i8* %Y) nou
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length32:
-; X64:       # BB#0: # %loadbb
-; X64-NEXT:    movq (%rdi), %rcx
-; X64-NEXT:    movq (%rsi), %rdx
-; X64-NEXT:    bswapq %rcx
-; X64-NEXT:    bswapq %rdx
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB22_1
-; X64-NEXT:  # BB#2: # %loadbb1
-; X64-NEXT:    movq 8(%rdi), %rcx
-; X64-NEXT:    movq 8(%rsi), %rdx
-; X64-NEXT:    bswapq %rcx
-; X64-NEXT:    bswapq %rdx
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB22_1
-; X64-NEXT:  # BB#3: # %loadbb2
-; X64-NEXT:    movq 16(%rdi), %rcx
-; X64-NEXT:    movq 16(%rsi), %rdx
-; X64-NEXT:    bswapq %rcx
-; X64-NEXT:    bswapq %rdx
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB22_1
-; X64-NEXT:  # BB#4: # %loadbb3
-; X64-NEXT:    movq 24(%rdi), %rcx
-; X64-NEXT:    movq 24(%rsi), %rdx
-; X64-NEXT:    bswapq %rcx
-; X64-NEXT:    bswapq %rdx
-; X64-NEXT:    xorl %eax, %eax
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    jne .LBB22_1
-; X64-NEXT:  # BB#5: # %endblock
-; X64-NEXT:    retq
-; X64-NEXT:  .LBB22_1: # %res_block
-; X64-NEXT:    cmpq %rdx, %rcx
-; X64-NEXT:    movl $-1, %ecx
-; X64-NEXT:    movl $1, %eax
-; X64-NEXT:    cmovbl %ecx, %eax
-; X64-NEXT:    retq
+; X64:       # BB#0:
+; X64-NEXT:    movl $32, %edx
+; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 32) nounwind
   ret i32 %m
 }
@@ -944,30 +787,25 @@ define i1 @length32_eq(i8* %x, i8* %y) n
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
-; X64-LABEL: length32_eq:
-; X64:       # BB#0: # %loadbb
-; X64-NEXT:    movq (%rdi), %rax
-; X64-NEXT:    cmpq (%rsi), %rax
-; X64-NEXT:    jne .LBB23_1
-; X64-NEXT:  # BB#2: # %loadbb1
-; X64-NEXT:    movq 8(%rdi), %rax
-; X64-NEXT:    cmpq 8(%rsi), %rax
-; X64-NEXT:    jne .LBB23_1
-; X64-NEXT:  # BB#3: # %loadbb2
-; X64-NEXT:    movq 16(%rdi), %rax
-; X64-NEXT:    cmpq 16(%rsi), %rax
-; X64-NEXT:    jne .LBB23_1
-; X64-NEXT:  # BB#4: # %loadbb3
-; X64-NEXT:    movq 24(%rdi), %rcx
-; X64-NEXT:    xorl %eax, %eax
-; X64-NEXT:    cmpq 24(%rsi), %rcx
-; X64-NEXT:    je .LBB23_5
-; X64-NEXT:  .LBB23_1: # %res_block
-; X64-NEXT:    movl $1, %eax
-; X64-NEXT:  .LBB23_5: # %endblock
-; X64-NEXT:    testl %eax, %eax
-; X64-NEXT:    sete %al
-; X64-NEXT:    retq
+; X64-SSE2-LABEL: length32_eq:
+; X64-SSE2:       # BB#0:
+; X64-SSE2-NEXT:    pushq %rax
+; X64-SSE2-NEXT:    movl $32, %edx
+; X64-SSE2-NEXT:    callq memcmp
+; X64-SSE2-NEXT:    testl %eax, %eax
+; X64-SSE2-NEXT:    sete %al
+; X64-SSE2-NEXT:    popq %rcx
+; X64-SSE2-NEXT:    retq
+;
+; X64-AVX2-LABEL: length32_eq:
+; X64-AVX2:       # BB#0:
+; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
+; X64-AVX2-NEXT:    vpcmpeqb (%rsi), %ymm0, %ymm0
+; X64-AVX2-NEXT:    vpmovmskb %ymm0, %eax
+; X64-AVX2-NEXT:    cmpl $-1, %eax
+; X64-AVX2-NEXT:    sete %al
+; X64-AVX2-NEXT:    vzeroupper
+; X64-AVX2-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 32) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
@@ -986,30 +824,26 @@ define i1 @length32_eq_const(i8* %X) nou
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
-; X64-LABEL: length32_eq_const:
-; X64:       # BB#0: # %loadbb
-; X64-NEXT:    movabsq $3978425819141910832, %rax # imm = 0x3736353433323130
-; X64-NEXT:    cmpq %rax, (%rdi)
-; X64-NEXT:    jne .LBB24_1
-; X64-NEXT:  # BB#2: # %loadbb1
-; X64-NEXT:    movabsq $3833745473465760056, %rax # imm = 0x3534333231303938
-; X64-NEXT:    cmpq %rax, 8(%rdi)
-; X64-NEXT:    jne .LBB24_1
-; X64-NEXT:  # BB#3: # %loadbb2
-; X64-NEXT:    movabsq $3689065127958034230, %rax # imm = 0x3332313039383736
-; X64-NEXT:    cmpq %rax, 16(%rdi)
-; X64-NEXT:    jne .LBB24_1
-; X64-NEXT:  # BB#4: # %loadbb3
-; X64-NEXT:    xorl %eax, %eax
-; X64-NEXT:    movabsq $3544395820347831604, %rcx # imm = 0x3130393837363534
-; X64-NEXT:    cmpq %rcx, 24(%rdi)
-; X64-NEXT:    je .LBB24_5
-; X64-NEXT:  .LBB24_1: # %res_block
-; X64-NEXT:    movl $1, %eax
-; X64-NEXT:  .LBB24_5: # %endblock
-; X64-NEXT:    testl %eax, %eax
-; X64-NEXT:    setne %al
-; X64-NEXT:    retq
+; X64-SSE2-LABEL: length32_eq_const:
+; X64-SSE2:       # BB#0:
+; X64-SSE2-NEXT:    pushq %rax
+; X64-SSE2-NEXT:    movl $.L.str, %esi
+; X64-SSE2-NEXT:    movl $32, %edx
+; X64-SSE2-NEXT:    callq memcmp
+; X64-SSE2-NEXT:    testl %eax, %eax
+; X64-SSE2-NEXT:    setne %al
+; X64-SSE2-NEXT:    popq %rcx
+; X64-SSE2-NEXT:    retq
+;
+; X64-AVX2-LABEL: length32_eq_const:
+; X64-AVX2:       # BB#0:
+; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
+; X64-AVX2-NEXT:    vpcmpeqb {{.*}}(%rip), %ymm0, %ymm0
+; X64-AVX2-NEXT:    vpmovmskb %ymm0, %eax
+; X64-AVX2-NEXT:    cmpl $-1, %eax
+; X64-AVX2-NEXT:    setne %al
+; X64-AVX2-NEXT:    vzeroupper
+; X64-AVX2-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 32) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c

Modified: llvm/trunk/test/Transforms/CodeGenPrepare/X86/memcmp.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/CodeGenPrepare/X86/memcmp.ll?rev=308986&r1=308985&r2=308986&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/CodeGenPrepare/X86/memcmp.ll (original)
+++ llvm/trunk/test/Transforms/CodeGenPrepare/X86/memcmp.ll Tue Jul 25 10:04:37 2017
@@ -238,91 +238,9 @@ define i32 @cmp6(i8* nocapture readonly
 }
 
 define i32 @cmp7(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp7(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP17:%.*]], [[LOADBB1]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP18:%.*]], [[LOADBB1]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i16*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i16*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i16, i16* [[TMP9]], i16 2
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i16, i16* [[TMP10]], i16 2
-; X32-NEXT:    [[TMP13:%.*]] = load i16, i16* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i16, i16* [[TMP12]]
-; X32-NEXT:    [[TMP15:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP13]])
-; X32-NEXT:    [[TMP16:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP14]])
-; X32-NEXT:    [[TMP17]] = zext i16 [[TMP15]] to i32
-; X32-NEXT:    [[TMP18]] = zext i16 [[TMP16]] to i32
-; X32-NEXT:    [[TMP19:%.*]] = icmp eq i32 [[TMP17]], [[TMP18]]
-; X32-NEXT:    br i1 [[TMP19]], label [[LOADBB2:%.*]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i8, i8* [[X]], i8 6
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i8, i8* [[Y]], i8 6
-; X32-NEXT:    [[TMP22:%.*]] = load i8, i8* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = load i8, i8* [[TMP21]]
-; X32-NEXT:    [[TMP24:%.*]] = zext i8 [[TMP22]] to i32
-; X32-NEXT:    [[TMP25:%.*]] = zext i8 [[TMP23]] to i32
-; X32-NEXT:    [[TMP26:%.*]] = sub i32 [[TMP24]], [[TMP25]]
-; X32-NEXT:    br label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP26]], [[LOADBB2]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
-;
-; X64-LABEL: @cmp7(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X64-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X64-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X64-NEXT:    [[TMP6:%.*]] = zext i32 [[TMP4]] to i64
-; X64-NEXT:    [[TMP7:%.*]] = zext i32 [[TMP5]] to i64
-; X64-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[TMP6]], [[TMP7]]
-; X64-NEXT:    br i1 [[TMP8]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X64:       res_block:
-; X64-NEXT:    [[PHI_SRC1:%.*]] = phi i64 [ [[TMP6]], [[LOADBB:%.*]] ], [ [[TMP19:%.*]], [[LOADBB1]] ]
-; X64-NEXT:    [[PHI_SRC2:%.*]] = phi i64 [ [[TMP7]], [[LOADBB]] ], [ [[TMP20:%.*]], [[LOADBB1]] ]
-; X64-NEXT:    [[TMP9:%.*]] = icmp ult i64 [[PHI_SRC1]], [[PHI_SRC2]]
-; X64-NEXT:    [[TMP10:%.*]] = select i1 [[TMP9]], i32 -1, i32 1
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP11:%.*]] = bitcast i8* [[X]] to i16*
-; X64-NEXT:    [[TMP12:%.*]] = bitcast i8* [[Y]] to i16*
-; X64-NEXT:    [[TMP13:%.*]] = getelementptr i16, i16* [[TMP11]], i16 2
-; X64-NEXT:    [[TMP14:%.*]] = getelementptr i16, i16* [[TMP12]], i16 2
-; X64-NEXT:    [[TMP15:%.*]] = load i16, i16* [[TMP13]]
-; X64-NEXT:    [[TMP16:%.*]] = load i16, i16* [[TMP14]]
-; X64-NEXT:    [[TMP17:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP15]])
-; X64-NEXT:    [[TMP18:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP16]])
-; X64-NEXT:    [[TMP19]] = zext i16 [[TMP17]] to i64
-; X64-NEXT:    [[TMP20]] = zext i16 [[TMP18]] to i64
-; X64-NEXT:    [[TMP21:%.*]] = icmp eq i64 [[TMP19]], [[TMP20]]
-; X64-NEXT:    br i1 [[TMP21]], label [[LOADBB2:%.*]], label [[RES_BLOCK]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP22:%.*]] = getelementptr i8, i8* [[X]], i8 6
-; X64-NEXT:    [[TMP23:%.*]] = getelementptr i8, i8* [[Y]], i8 6
-; X64-NEXT:    [[TMP24:%.*]] = load i8, i8* [[TMP22]]
-; X64-NEXT:    [[TMP25:%.*]] = load i8, i8* [[TMP23]]
-; X64-NEXT:    [[TMP26:%.*]] = zext i8 [[TMP24]] to i32
-; X64-NEXT:    [[TMP27:%.*]] = zext i8 [[TMP25]] to i32
-; X64-NEXT:    [[TMP28:%.*]] = sub i32 [[TMP26]], [[TMP27]]
-; X64-NEXT:    br label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP28]], [[LOADBB2]] ], [ [[TMP10]], [[RES_BLOCK]] ]
-; X64-NEXT:    ret i32 [[PHI_RES]]
+; ALL-LABEL: @cmp7(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 7)
+; ALL-NEXT:    ret i32 [[CALL]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 7)
   ret i32 %call
@@ -379,44 +297,8 @@ define i32 @cmp8(i8* nocapture readonly
 
 define i32 @cmp9(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp9(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP15:%.*]], [[LOADBB1]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP16:%.*]], [[LOADBB1]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 1
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 1
-; X32-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X32-NEXT:    [[TMP15]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X32-NEXT:    [[TMP16]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X32-NEXT:    [[TMP17:%.*]] = icmp eq i32 [[TMP15]], [[TMP16]]
-; X32-NEXT:    br i1 [[TMP17]], label [[LOADBB2:%.*]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP18:%.*]] = getelementptr i8, i8* [[X]], i8 8
-; X32-NEXT:    [[TMP19:%.*]] = getelementptr i8, i8* [[Y]], i8 8
-; X32-NEXT:    [[TMP20:%.*]] = load i8, i8* [[TMP18]]
-; X32-NEXT:    [[TMP21:%.*]] = load i8, i8* [[TMP19]]
-; X32-NEXT:    [[TMP22:%.*]] = zext i8 [[TMP20]] to i32
-; X32-NEXT:    [[TMP23:%.*]] = zext i8 [[TMP21]] to i32
-; X32-NEXT:    [[TMP24:%.*]] = sub i32 [[TMP22]], [[TMP23]]
-; X32-NEXT:    br label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP24]], [[LOADBB2]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 9)
+; X32-NEXT:    ret i32 [[CALL]]
 ;
 ; X64-LABEL: @cmp9(
 ; X64-NEXT:  loadbb:
@@ -451,48 +333,8 @@ define i32 @cmp9(i8* nocapture readonly
 
 define i32 @cmp10(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp10(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP15:%.*]], [[LOADBB1]] ], [ [[TMP26:%.*]], [[LOADBB2:%.*]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP16:%.*]], [[LOADBB1]] ], [ [[TMP27:%.*]], [[LOADBB2]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 1
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 1
-; X32-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X32-NEXT:    [[TMP15]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X32-NEXT:    [[TMP16]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X32-NEXT:    [[TMP17:%.*]] = icmp eq i32 [[TMP15]], [[TMP16]]
-; X32-NEXT:    br i1 [[TMP17]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP18:%.*]] = bitcast i8* [[X]] to i16*
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[Y]] to i16*
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i16, i16* [[TMP18]], i16 4
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i16, i16* [[TMP19]], i16 4
-; X32-NEXT:    [[TMP22:%.*]] = load i16, i16* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = load i16, i16* [[TMP21]]
-; X32-NEXT:    [[TMP24:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP22]])
-; X32-NEXT:    [[TMP25:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP23]])
-; X32-NEXT:    [[TMP26]] = zext i16 [[TMP24]] to i32
-; X32-NEXT:    [[TMP27]] = zext i16 [[TMP25]] to i32
-; X32-NEXT:    [[TMP28:%.*]] = icmp eq i32 [[TMP26]], [[TMP27]]
-; X32-NEXT:    br i1 [[TMP28]], label [[ENDBLOCK]], label [[RES_BLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 10)
+; X32-NEXT:    ret i32 [[CALL]]
 ;
 ; X64-LABEL: @cmp10(
 ; X64-NEXT:  loadbb:
@@ -532,100 +374,9 @@ define i32 @cmp10(i8* nocapture readonly
 }
 
 define i32 @cmp11(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp11(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP15:%.*]], [[LOADBB1]] ], [ [[TMP26:%.*]], [[LOADBB2:%.*]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP16:%.*]], [[LOADBB1]] ], [ [[TMP27:%.*]], [[LOADBB2]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 1
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 1
-; X32-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X32-NEXT:    [[TMP15]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X32-NEXT:    [[TMP16]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X32-NEXT:    [[TMP17:%.*]] = icmp eq i32 [[TMP15]], [[TMP16]]
-; X32-NEXT:    br i1 [[TMP17]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP18:%.*]] = bitcast i8* [[X]] to i16*
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[Y]] to i16*
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i16, i16* [[TMP18]], i16 4
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i16, i16* [[TMP19]], i16 4
-; X32-NEXT:    [[TMP22:%.*]] = load i16, i16* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = load i16, i16* [[TMP21]]
-; X32-NEXT:    [[TMP24:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP22]])
-; X32-NEXT:    [[TMP25:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP23]])
-; X32-NEXT:    [[TMP26]] = zext i16 [[TMP24]] to i32
-; X32-NEXT:    [[TMP27]] = zext i16 [[TMP25]] to i32
-; X32-NEXT:    [[TMP28:%.*]] = icmp eq i32 [[TMP26]], [[TMP27]]
-; X32-NEXT:    br i1 [[TMP28]], label [[LOADBB3:%.*]], label [[RES_BLOCK]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP29:%.*]] = getelementptr i8, i8* [[X]], i8 10
-; X32-NEXT:    [[TMP30:%.*]] = getelementptr i8, i8* [[Y]], i8 10
-; X32-NEXT:    [[TMP31:%.*]] = load i8, i8* [[TMP29]]
-; X32-NEXT:    [[TMP32:%.*]] = load i8, i8* [[TMP30]]
-; X32-NEXT:    [[TMP33:%.*]] = zext i8 [[TMP31]] to i32
-; X32-NEXT:    [[TMP34:%.*]] = zext i8 [[TMP32]] to i32
-; X32-NEXT:    [[TMP35:%.*]] = sub i32 [[TMP33]], [[TMP34]]
-; X32-NEXT:    br label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP35]], [[LOADBB3]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
-;
-; X64-LABEL: @cmp11(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP2]])
-; X64-NEXT:    [[TMP5:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP3]])
-; X64-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[TMP4]], [[TMP5]]
-; X64-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X64:       res_block:
-; X64-NEXT:    [[PHI_SRC1:%.*]] = phi i64 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP17:%.*]], [[LOADBB1]] ]
-; X64-NEXT:    [[PHI_SRC2:%.*]] = phi i64 [ [[TMP5]], [[LOADBB]] ], [ [[TMP18:%.*]], [[LOADBB1]] ]
-; X64-NEXT:    [[TMP7:%.*]] = icmp ult i64 [[PHI_SRC1]], [[PHI_SRC2]]
-; X64-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i16*
-; X64-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i16*
-; X64-NEXT:    [[TMP11:%.*]] = getelementptr i16, i16* [[TMP9]], i16 4
-; X64-NEXT:    [[TMP12:%.*]] = getelementptr i16, i16* [[TMP10]], i16 4
-; X64-NEXT:    [[TMP13:%.*]] = load i16, i16* [[TMP11]]
-; X64-NEXT:    [[TMP14:%.*]] = load i16, i16* [[TMP12]]
-; X64-NEXT:    [[TMP15:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP13]])
-; X64-NEXT:    [[TMP16:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP14]])
-; X64-NEXT:    [[TMP17]] = zext i16 [[TMP15]] to i64
-; X64-NEXT:    [[TMP18]] = zext i16 [[TMP16]] to i64
-; X64-NEXT:    [[TMP19:%.*]] = icmp eq i64 [[TMP17]], [[TMP18]]
-; X64-NEXT:    br i1 [[TMP19]], label [[LOADBB2:%.*]], label [[RES_BLOCK]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP20:%.*]] = getelementptr i8, i8* [[X]], i8 10
-; X64-NEXT:    [[TMP21:%.*]] = getelementptr i8, i8* [[Y]], i8 10
-; X64-NEXT:    [[TMP22:%.*]] = load i8, i8* [[TMP20]]
-; X64-NEXT:    [[TMP23:%.*]] = load i8, i8* [[TMP21]]
-; X64-NEXT:    [[TMP24:%.*]] = zext i8 [[TMP22]] to i32
-; X64-NEXT:    [[TMP25:%.*]] = zext i8 [[TMP23]] to i32
-; X64-NEXT:    [[TMP26:%.*]] = sub i32 [[TMP24]], [[TMP25]]
-; X64-NEXT:    br label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP26]], [[LOADBB2]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X64-NEXT:    ret i32 [[PHI_RES]]
+; ALL-LABEL: @cmp11(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 11)
+; ALL-NEXT:    ret i32 [[CALL]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 11)
   ret i32 %call
@@ -633,46 +384,8 @@ define i32 @cmp11(i8* nocapture readonly
 
 define i32 @cmp12(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp12(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP15:%.*]], [[LOADBB1]] ], [ [[TMP24:%.*]], [[LOADBB2:%.*]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP16:%.*]], [[LOADBB1]] ], [ [[TMP25:%.*]], [[LOADBB2]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 1
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 1
-; X32-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X32-NEXT:    [[TMP15]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X32-NEXT:    [[TMP16]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X32-NEXT:    [[TMP17:%.*]] = icmp eq i32 [[TMP15]], [[TMP16]]
-; X32-NEXT:    br i1 [[TMP17]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP18:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i32, i32* [[TMP18]], i32 2
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i32, i32* [[TMP19]], i32 2
-; X32-NEXT:    [[TMP22:%.*]] = load i32, i32* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = load i32, i32* [[TMP21]]
-; X32-NEXT:    [[TMP24]] = call i32 @llvm.bswap.i32(i32 [[TMP22]])
-; X32-NEXT:    [[TMP25]] = call i32 @llvm.bswap.i32(i32 [[TMP23]])
-; X32-NEXT:    [[TMP26:%.*]] = icmp eq i32 [[TMP24]], [[TMP25]]
-; X32-NEXT:    br i1 [[TMP26]], label [[ENDBLOCK]], label [[RES_BLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 12)
+; X32-NEXT:    ret i32 [[CALL]]
 ;
 ; X64-LABEL: @cmp12(
 ; X64-NEXT:  loadbb:
@@ -712,268 +425,27 @@ define i32 @cmp12(i8* nocapture readonly
 }
 
 define i32 @cmp13(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp13(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP15:%.*]], [[LOADBB1]] ], [ [[TMP24:%.*]], [[LOADBB2:%.*]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP16:%.*]], [[LOADBB1]] ], [ [[TMP25:%.*]], [[LOADBB2]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 1
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 1
-; X32-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X32-NEXT:    [[TMP15]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X32-NEXT:    [[TMP16]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X32-NEXT:    [[TMP17:%.*]] = icmp eq i32 [[TMP15]], [[TMP16]]
-; X32-NEXT:    br i1 [[TMP17]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP18:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i32, i32* [[TMP18]], i32 2
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i32, i32* [[TMP19]], i32 2
-; X32-NEXT:    [[TMP22:%.*]] = load i32, i32* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = load i32, i32* [[TMP21]]
-; X32-NEXT:    [[TMP24]] = call i32 @llvm.bswap.i32(i32 [[TMP22]])
-; X32-NEXT:    [[TMP25]] = call i32 @llvm.bswap.i32(i32 [[TMP23]])
-; X32-NEXT:    [[TMP26:%.*]] = icmp eq i32 [[TMP24]], [[TMP25]]
-; X32-NEXT:    br i1 [[TMP26]], label [[LOADBB3:%.*]], label [[RES_BLOCK]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP27:%.*]] = getelementptr i8, i8* [[X]], i8 12
-; X32-NEXT:    [[TMP28:%.*]] = getelementptr i8, i8* [[Y]], i8 12
-; X32-NEXT:    [[TMP29:%.*]] = load i8, i8* [[TMP27]]
-; X32-NEXT:    [[TMP30:%.*]] = load i8, i8* [[TMP28]]
-; X32-NEXT:    [[TMP31:%.*]] = zext i8 [[TMP29]] to i32
-; X32-NEXT:    [[TMP32:%.*]] = zext i8 [[TMP30]] to i32
-; X32-NEXT:    [[TMP33:%.*]] = sub i32 [[TMP31]], [[TMP32]]
-; X32-NEXT:    br label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP33]], [[LOADBB3]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
-;
-; X64-LABEL: @cmp13(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP2]])
-; X64-NEXT:    [[TMP5:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP3]])
-; X64-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[TMP4]], [[TMP5]]
-; X64-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X64:       res_block:
-; X64-NEXT:    [[PHI_SRC1:%.*]] = phi i64 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP17:%.*]], [[LOADBB1]] ]
-; X64-NEXT:    [[PHI_SRC2:%.*]] = phi i64 [ [[TMP5]], [[LOADBB]] ], [ [[TMP18:%.*]], [[LOADBB1]] ]
-; X64-NEXT:    [[TMP7:%.*]] = icmp ult i64 [[PHI_SRC1]], [[PHI_SRC2]]
-; X64-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X64-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X64-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 2
-; X64-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 2
-; X64-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X64-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X64-NEXT:    [[TMP15:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X64-NEXT:    [[TMP16:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X64-NEXT:    [[TMP17]] = zext i32 [[TMP15]] to i64
-; X64-NEXT:    [[TMP18]] = zext i32 [[TMP16]] to i64
-; X64-NEXT:    [[TMP19:%.*]] = icmp eq i64 [[TMP17]], [[TMP18]]
-; X64-NEXT:    br i1 [[TMP19]], label [[LOADBB2:%.*]], label [[RES_BLOCK]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP20:%.*]] = getelementptr i8, i8* [[X]], i8 12
-; X64-NEXT:    [[TMP21:%.*]] = getelementptr i8, i8* [[Y]], i8 12
-; X64-NEXT:    [[TMP22:%.*]] = load i8, i8* [[TMP20]]
-; X64-NEXT:    [[TMP23:%.*]] = load i8, i8* [[TMP21]]
-; X64-NEXT:    [[TMP24:%.*]] = zext i8 [[TMP22]] to i32
-; X64-NEXT:    [[TMP25:%.*]] = zext i8 [[TMP23]] to i32
-; X64-NEXT:    [[TMP26:%.*]] = sub i32 [[TMP24]], [[TMP25]]
-; X64-NEXT:    br label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP26]], [[LOADBB2]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X64-NEXT:    ret i32 [[PHI_RES]]
+; ALL-LABEL: @cmp13(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 13)
+; ALL-NEXT:    ret i32 [[CALL]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 13)
   ret i32 %call
 }
 
 define i32 @cmp14(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp14(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP15:%.*]], [[LOADBB1]] ], [ [[TMP24:%.*]], [[LOADBB2:%.*]] ], [ [[TMP35:%.*]], [[LOADBB3:%.*]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP16:%.*]], [[LOADBB1]] ], [ [[TMP25:%.*]], [[LOADBB2]] ], [ [[TMP36:%.*]], [[LOADBB3]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 1
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 1
-; X32-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X32-NEXT:    [[TMP15]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X32-NEXT:    [[TMP16]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X32-NEXT:    [[TMP17:%.*]] = icmp eq i32 [[TMP15]], [[TMP16]]
-; X32-NEXT:    br i1 [[TMP17]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP18:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i32, i32* [[TMP18]], i32 2
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i32, i32* [[TMP19]], i32 2
-; X32-NEXT:    [[TMP22:%.*]] = load i32, i32* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = load i32, i32* [[TMP21]]
-; X32-NEXT:    [[TMP24]] = call i32 @llvm.bswap.i32(i32 [[TMP22]])
-; X32-NEXT:    [[TMP25]] = call i32 @llvm.bswap.i32(i32 [[TMP23]])
-; X32-NEXT:    [[TMP26:%.*]] = icmp eq i32 [[TMP24]], [[TMP25]]
-; X32-NEXT:    br i1 [[TMP26]], label [[LOADBB3]], label [[RES_BLOCK]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP27:%.*]] = bitcast i8* [[X]] to i16*
-; X32-NEXT:    [[TMP28:%.*]] = bitcast i8* [[Y]] to i16*
-; X32-NEXT:    [[TMP29:%.*]] = getelementptr i16, i16* [[TMP27]], i16 6
-; X32-NEXT:    [[TMP30:%.*]] = getelementptr i16, i16* [[TMP28]], i16 6
-; X32-NEXT:    [[TMP31:%.*]] = load i16, i16* [[TMP29]]
-; X32-NEXT:    [[TMP32:%.*]] = load i16, i16* [[TMP30]]
-; X32-NEXT:    [[TMP33:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP31]])
-; X32-NEXT:    [[TMP34:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP32]])
-; X32-NEXT:    [[TMP35]] = zext i16 [[TMP33]] to i32
-; X32-NEXT:    [[TMP36]] = zext i16 [[TMP34]] to i32
-; X32-NEXT:    [[TMP37:%.*]] = icmp eq i32 [[TMP35]], [[TMP36]]
-; X32-NEXT:    br i1 [[TMP37]], label [[ENDBLOCK]], label [[RES_BLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB3]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
-;
-; X64-LABEL: @cmp14(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP2]])
-; X64-NEXT:    [[TMP5:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP3]])
-; X64-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[TMP4]], [[TMP5]]
-; X64-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X64:       res_block:
-; X64-NEXT:    [[PHI_SRC1:%.*]] = phi i64 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP17:%.*]], [[LOADBB1]] ], [ [[TMP28:%.*]], [[LOADBB2:%.*]] ]
-; X64-NEXT:    [[PHI_SRC2:%.*]] = phi i64 [ [[TMP5]], [[LOADBB]] ], [ [[TMP18:%.*]], [[LOADBB1]] ], [ [[TMP29:%.*]], [[LOADBB2]] ]
-; X64-NEXT:    [[TMP7:%.*]] = icmp ult i64 [[PHI_SRC1]], [[PHI_SRC2]]
-; X64-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X64-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X64-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 2
-; X64-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 2
-; X64-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X64-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X64-NEXT:    [[TMP15:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X64-NEXT:    [[TMP16:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X64-NEXT:    [[TMP17]] = zext i32 [[TMP15]] to i64
-; X64-NEXT:    [[TMP18]] = zext i32 [[TMP16]] to i64
-; X64-NEXT:    [[TMP19:%.*]] = icmp eq i64 [[TMP17]], [[TMP18]]
-; X64-NEXT:    br i1 [[TMP19]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP20:%.*]] = bitcast i8* [[X]] to i16*
-; X64-NEXT:    [[TMP21:%.*]] = bitcast i8* [[Y]] to i16*
-; X64-NEXT:    [[TMP22:%.*]] = getelementptr i16, i16* [[TMP20]], i16 6
-; X64-NEXT:    [[TMP23:%.*]] = getelementptr i16, i16* [[TMP21]], i16 6
-; X64-NEXT:    [[TMP24:%.*]] = load i16, i16* [[TMP22]]
-; X64-NEXT:    [[TMP25:%.*]] = load i16, i16* [[TMP23]]
-; X64-NEXT:    [[TMP26:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP24]])
-; X64-NEXT:    [[TMP27:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP25]])
-; X64-NEXT:    [[TMP28]] = zext i16 [[TMP26]] to i64
-; X64-NEXT:    [[TMP29]] = zext i16 [[TMP27]] to i64
-; X64-NEXT:    [[TMP30:%.*]] = icmp eq i64 [[TMP28]], [[TMP29]]
-; X64-NEXT:    br i1 [[TMP30]], label [[ENDBLOCK]], label [[RES_BLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X64-NEXT:    ret i32 [[PHI_RES]]
+; ALL-LABEL: @cmp14(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 14)
+; ALL-NEXT:    ret i32 [[CALL]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 14)
   ret i32 %call
 }
 
 define i32 @cmp15(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp15(
-; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 15)
-; X32-NEXT:    ret i32 [[CALL]]
-;
-; X64-LABEL: @cmp15(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP2]])
-; X64-NEXT:    [[TMP5:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP3]])
-; X64-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[TMP4]], [[TMP5]]
-; X64-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X64:       res_block:
-; X64-NEXT:    [[PHI_SRC1:%.*]] = phi i64 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP17:%.*]], [[LOADBB1]] ], [ [[TMP28:%.*]], [[LOADBB2:%.*]] ]
-; X64-NEXT:    [[PHI_SRC2:%.*]] = phi i64 [ [[TMP5]], [[LOADBB]] ], [ [[TMP18:%.*]], [[LOADBB1]] ], [ [[TMP29:%.*]], [[LOADBB2]] ]
-; X64-NEXT:    [[TMP7:%.*]] = icmp ult i64 [[PHI_SRC1]], [[PHI_SRC2]]
-; X64-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X64-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X64-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 2
-; X64-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 2
-; X64-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X64-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X64-NEXT:    [[TMP15:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X64-NEXT:    [[TMP16:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X64-NEXT:    [[TMP17]] = zext i32 [[TMP15]] to i64
-; X64-NEXT:    [[TMP18]] = zext i32 [[TMP16]] to i64
-; X64-NEXT:    [[TMP19:%.*]] = icmp eq i64 [[TMP17]], [[TMP18]]
-; X64-NEXT:    br i1 [[TMP19]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP20:%.*]] = bitcast i8* [[X]] to i16*
-; X64-NEXT:    [[TMP21:%.*]] = bitcast i8* [[Y]] to i16*
-; X64-NEXT:    [[TMP22:%.*]] = getelementptr i16, i16* [[TMP20]], i16 6
-; X64-NEXT:    [[TMP23:%.*]] = getelementptr i16, i16* [[TMP21]], i16 6
-; X64-NEXT:    [[TMP24:%.*]] = load i16, i16* [[TMP22]]
-; X64-NEXT:    [[TMP25:%.*]] = load i16, i16* [[TMP23]]
-; X64-NEXT:    [[TMP26:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP24]])
-; X64-NEXT:    [[TMP27:%.*]] = call i16 @llvm.bswap.i16(i16 [[TMP25]])
-; X64-NEXT:    [[TMP28]] = zext i16 [[TMP26]] to i64
-; X64-NEXT:    [[TMP29]] = zext i16 [[TMP27]] to i64
-; X64-NEXT:    [[TMP30:%.*]] = icmp eq i64 [[TMP28]], [[TMP29]]
-; X64-NEXT:    br i1 [[TMP30]], label [[LOADBB3:%.*]], label [[RES_BLOCK]]
-; X64:       loadbb3:
-; X64-NEXT:    [[TMP31:%.*]] = getelementptr i8, i8* [[X]], i8 14
-; X64-NEXT:    [[TMP32:%.*]] = getelementptr i8, i8* [[Y]], i8 14
-; X64-NEXT:    [[TMP33:%.*]] = load i8, i8* [[TMP31]]
-; X64-NEXT:    [[TMP34:%.*]] = load i8, i8* [[TMP32]]
-; X64-NEXT:    [[TMP35:%.*]] = zext i8 [[TMP33]] to i32
-; X64-NEXT:    [[TMP36:%.*]] = zext i8 [[TMP34]] to i32
-; X64-NEXT:    [[TMP37:%.*]] = sub i32 [[TMP35]], [[TMP36]]
-; X64-NEXT:    br label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ [[TMP37]], [[LOADBB3]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X64-NEXT:    ret i32 [[PHI_RES]]
+; ALL-LABEL: @cmp15(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 15)
+; ALL-NEXT:    ret i32 [[CALL]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 15)
   ret i32 %call
@@ -981,57 +453,8 @@ define i32 @cmp15(i8* nocapture readonly
 
 define i32 @cmp16(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp16(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP2]])
-; X32-NEXT:    [[TMP5:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP3]])
-; X32-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
-; X32-NEXT:    br i1 [[TMP6]], label [[LOADBB1:%.*]], label [[RES_BLOCK:%.*]]
-; X32:       res_block:
-; X32-NEXT:    [[PHI_SRC1:%.*]] = phi i32 [ [[TMP4]], [[LOADBB:%.*]] ], [ [[TMP15:%.*]], [[LOADBB1]] ], [ [[TMP24:%.*]], [[LOADBB2:%.*]] ], [ [[TMP33:%.*]], [[LOADBB3:%.*]] ]
-; X32-NEXT:    [[PHI_SRC2:%.*]] = phi i32 [ [[TMP5]], [[LOADBB]] ], [ [[TMP16:%.*]], [[LOADBB1]] ], [ [[TMP25:%.*]], [[LOADBB2]] ], [ [[TMP34:%.*]], [[LOADBB3]] ]
-; X32-NEXT:    [[TMP7:%.*]] = icmp ult i32 [[PHI_SRC1]], [[PHI_SRC2]]
-; X32-NEXT:    [[TMP8:%.*]] = select i1 [[TMP7]], i32 -1, i32 1
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP9:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP10:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP11:%.*]] = getelementptr i32, i32* [[TMP9]], i32 1
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i32, i32* [[TMP10]], i32 1
-; X32-NEXT:    [[TMP13:%.*]] = load i32, i32* [[TMP11]]
-; X32-NEXT:    [[TMP14:%.*]] = load i32, i32* [[TMP12]]
-; X32-NEXT:    [[TMP15]] = call i32 @llvm.bswap.i32(i32 [[TMP13]])
-; X32-NEXT:    [[TMP16]] = call i32 @llvm.bswap.i32(i32 [[TMP14]])
-; X32-NEXT:    [[TMP17:%.*]] = icmp eq i32 [[TMP15]], [[TMP16]]
-; X32-NEXT:    br i1 [[TMP17]], label [[LOADBB2]], label [[RES_BLOCK]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP18:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i32, i32* [[TMP18]], i32 2
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i32, i32* [[TMP19]], i32 2
-; X32-NEXT:    [[TMP22:%.*]] = load i32, i32* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = load i32, i32* [[TMP21]]
-; X32-NEXT:    [[TMP24]] = call i32 @llvm.bswap.i32(i32 [[TMP22]])
-; X32-NEXT:    [[TMP25]] = call i32 @llvm.bswap.i32(i32 [[TMP23]])
-; X32-NEXT:    [[TMP26:%.*]] = icmp eq i32 [[TMP24]], [[TMP25]]
-; X32-NEXT:    br i1 [[TMP26]], label [[LOADBB3]], label [[RES_BLOCK]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP27:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP28:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP29:%.*]] = getelementptr i32, i32* [[TMP27]], i32 3
-; X32-NEXT:    [[TMP30:%.*]] = getelementptr i32, i32* [[TMP28]], i32 3
-; X32-NEXT:    [[TMP31:%.*]] = load i32, i32* [[TMP29]]
-; X32-NEXT:    [[TMP32:%.*]] = load i32, i32* [[TMP30]]
-; X32-NEXT:    [[TMP33]] = call i32 @llvm.bswap.i32(i32 [[TMP31]])
-; X32-NEXT:    [[TMP34]] = call i32 @llvm.bswap.i32(i32 [[TMP32]])
-; X32-NEXT:    [[TMP35:%.*]] = icmp eq i32 [[TMP33]], [[TMP34]]
-; X32-NEXT:    br i1 [[TMP35]], label [[ENDBLOCK]], label [[RES_BLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB3]] ], [ [[TMP8]], [[RES_BLOCK]] ]
-; X32-NEXT:    ret i32 [[PHI_RES]]
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 16)
+; X32-NEXT:    ret i32 [[CALL]]
 ;
 ; X64-LABEL: @cmp16(
 ; X64-NEXT:  loadbb:
@@ -1165,39 +588,7 @@ define i32 @cmp_eq5(i8* nocapture readon
 }
 
 define i32 @cmp_eq6(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; ALL-LABEL: @cmp_eq6(
-; ALL-NEXT:  loadbb:
-; ALL-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; ALL-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; ALL-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; ALL-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; ALL-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; ALL-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; ALL:       res_block:
-; ALL-NEXT:    br label [[ENDBLOCK:%.*]]
-; ALL:       loadbb1:
-; ALL-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i16*
-; ALL-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i16*
-; ALL-NEXT:    [[TMP7:%.*]] = getelementptr i16, i16* [[TMP5]], i16 2
-; ALL-NEXT:    [[TMP8:%.*]] = getelementptr i16, i16* [[TMP6]], i16 2
-; ALL-NEXT:    [[TMP9:%.*]] = load i16, i16* [[TMP7]]
-; ALL-NEXT:    [[TMP10:%.*]] = load i16, i16* [[TMP8]]
-; ALL-NEXT:    [[TMP11:%.*]] = icmp ne i16 [[TMP9]], [[TMP10]]
-; ALL-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; ALL:       endblock:
-; ALL-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB1]] ], [ 1, [[RES_BLOCK]] ]
-; ALL-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; ALL-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; ALL-NEXT:    ret i32 [[CONV]]
-;
-  %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 6)
-  %cmp = icmp eq i32 %call, 0
-  %conv = zext i1 %cmp to i32
-  ret i32 %conv
-}
-
-define i32 @cmp_eq7(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; ALL-LABEL: @cmp_eq7(
+; ALL-LABEL: @cmp_eq6(
 ; ALL-NEXT:  loadbb:
 ; ALL-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
 ; ALL-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
@@ -1215,20 +606,26 @@ define i32 @cmp_eq7(i8* nocapture readon
 ; ALL-NEXT:    [[TMP9:%.*]] = load i16, i16* [[TMP7]]
 ; ALL-NEXT:    [[TMP10:%.*]] = load i16, i16* [[TMP8]]
 ; ALL-NEXT:    [[TMP11:%.*]] = icmp ne i16 [[TMP9]], [[TMP10]]
-; ALL-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; ALL:       loadbb2:
-; ALL-NEXT:    [[TMP12:%.*]] = getelementptr i8, i8* [[X]], i8 6
-; ALL-NEXT:    [[TMP13:%.*]] = getelementptr i8, i8* [[Y]], i8 6
-; ALL-NEXT:    [[TMP14:%.*]] = load i8, i8* [[TMP12]]
-; ALL-NEXT:    [[TMP15:%.*]] = load i8, i8* [[TMP13]]
-; ALL-NEXT:    [[TMP16:%.*]] = icmp ne i8 [[TMP14]], [[TMP15]]
-; ALL-NEXT:    br i1 [[TMP16]], label [[RES_BLOCK]], label [[ENDBLOCK]]
+; ALL-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[ENDBLOCK]]
 ; ALL:       endblock:
-; ALL-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ 1, [[RES_BLOCK]] ]
+; ALL-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB1]] ], [ 1, [[RES_BLOCK]] ]
 ; ALL-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
 ; ALL-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
 ; ALL-NEXT:    ret i32 [[CONV]]
 ;
+  %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 6)
+  %cmp = icmp eq i32 %call, 0
+  %conv = zext i1 %cmp to i32
+  ret i32 %conv
+}
+
+define i32 @cmp_eq7(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
+; ALL-LABEL: @cmp_eq7(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 7)
+; ALL-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
+; ALL-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
+; ALL-NEXT:    ret i32 [[CONV]]
+;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 7)
   %cmp = icmp eq i32 %call, 0
   %conv = zext i1 %cmp to i32
@@ -1280,34 +677,8 @@ define i32 @cmp_eq8(i8* nocapture readon
 
 define i32 @cmp_eq9(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp_eq9(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; X32-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X32:       res_block:
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 1
-; X32-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 1
-; X32-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X32-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X32-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X32-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP12:%.*]] = getelementptr i8, i8* [[X]], i8 8
-; X32-NEXT:    [[TMP13:%.*]] = getelementptr i8, i8* [[Y]], i8 8
-; X32-NEXT:    [[TMP14:%.*]] = load i8, i8* [[TMP12]]
-; X32-NEXT:    [[TMP15:%.*]] = load i8, i8* [[TMP13]]
-; X32-NEXT:    [[TMP16:%.*]] = icmp ne i8 [[TMP14]], [[TMP15]]
-; X32-NEXT:    br i1 [[TMP16]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ 1, [[RES_BLOCK]] ]
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 9)
+; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
 ; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
 ; X32-NEXT:    ret i32 [[CONV]]
 ;
@@ -1342,36 +713,8 @@ define i32 @cmp_eq9(i8* nocapture readon
 
 define i32 @cmp_eq10(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp_eq10(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; X32-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X32:       res_block:
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 1
-; X32-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 1
-; X32-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X32-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X32-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X32-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i16*
-; X32-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i16*
-; X32-NEXT:    [[TMP14:%.*]] = getelementptr i16, i16* [[TMP12]], i16 4
-; X32-NEXT:    [[TMP15:%.*]] = getelementptr i16, i16* [[TMP13]], i16 4
-; X32-NEXT:    [[TMP16:%.*]] = load i16, i16* [[TMP14]]
-; X32-NEXT:    [[TMP17:%.*]] = load i16, i16* [[TMP15]]
-; X32-NEXT:    [[TMP18:%.*]] = icmp ne i16 [[TMP16]], [[TMP17]]
-; X32-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ 1, [[RES_BLOCK]] ]
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 10)
+; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
 ; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
 ; X32-NEXT:    ret i32 [[CONV]]
 ;
@@ -1407,78 +750,11 @@ define i32 @cmp_eq10(i8* nocapture reado
 }
 
 define i32 @cmp_eq11(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp_eq11(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; X32-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X32:       res_block:
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 1
-; X32-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 1
-; X32-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X32-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X32-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X32-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i16*
-; X32-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i16*
-; X32-NEXT:    [[TMP14:%.*]] = getelementptr i16, i16* [[TMP12]], i16 4
-; X32-NEXT:    [[TMP15:%.*]] = getelementptr i16, i16* [[TMP13]], i16 4
-; X32-NEXT:    [[TMP16:%.*]] = load i16, i16* [[TMP14]]
-; X32-NEXT:    [[TMP17:%.*]] = load i16, i16* [[TMP15]]
-; X32-NEXT:    [[TMP18:%.*]] = icmp ne i16 [[TMP16]], [[TMP17]]
-; X32-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[LOADBB3:%.*]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP19:%.*]] = getelementptr i8, i8* [[X]], i8 10
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i8, i8* [[Y]], i8 10
-; X32-NEXT:    [[TMP21:%.*]] = load i8, i8* [[TMP19]]
-; X32-NEXT:    [[TMP22:%.*]] = load i8, i8* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = icmp ne i8 [[TMP21]], [[TMP22]]
-; X32-NEXT:    br i1 [[TMP23]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB3]] ], [ 1, [[RES_BLOCK]] ]
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X32-NEXT:    ret i32 [[CONV]]
-;
-; X64-LABEL: @cmp_eq11(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = icmp ne i64 [[TMP2]], [[TMP3]]
-; X64-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X64:       res_block:
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i16*
-; X64-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i16*
-; X64-NEXT:    [[TMP7:%.*]] = getelementptr i16, i16* [[TMP5]], i16 4
-; X64-NEXT:    [[TMP8:%.*]] = getelementptr i16, i16* [[TMP6]], i16 4
-; X64-NEXT:    [[TMP9:%.*]] = load i16, i16* [[TMP7]]
-; X64-NEXT:    [[TMP10:%.*]] = load i16, i16* [[TMP8]]
-; X64-NEXT:    [[TMP11:%.*]] = icmp ne i16 [[TMP9]], [[TMP10]]
-; X64-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP12:%.*]] = getelementptr i8, i8* [[X]], i8 10
-; X64-NEXT:    [[TMP13:%.*]] = getelementptr i8, i8* [[Y]], i8 10
-; X64-NEXT:    [[TMP14:%.*]] = load i8, i8* [[TMP12]]
-; X64-NEXT:    [[TMP15:%.*]] = load i8, i8* [[TMP13]]
-; X64-NEXT:    [[TMP16:%.*]] = icmp ne i8 [[TMP14]], [[TMP15]]
-; X64-NEXT:    br i1 [[TMP16]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ 1, [[RES_BLOCK]] ]
-; X64-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; X64-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X64-NEXT:    ret i32 [[CONV]]
+; ALL-LABEL: @cmp_eq11(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 11)
+; ALL-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
+; ALL-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
+; ALL-NEXT:    ret i32 [[CONV]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 11)
   %cmp = icmp eq i32 %call, 0
@@ -1488,36 +764,8 @@ define i32 @cmp_eq11(i8* nocapture reado
 
 define i32 @cmp_eq12(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp_eq12(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; X32-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X32:       res_block:
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 1
-; X32-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 1
-; X32-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X32-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X32-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X32-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP14:%.*]] = getelementptr i32, i32* [[TMP12]], i32 2
-; X32-NEXT:    [[TMP15:%.*]] = getelementptr i32, i32* [[TMP13]], i32 2
-; X32-NEXT:    [[TMP16:%.*]] = load i32, i32* [[TMP14]]
-; X32-NEXT:    [[TMP17:%.*]] = load i32, i32* [[TMP15]]
-; X32-NEXT:    [[TMP18:%.*]] = icmp ne i32 [[TMP16]], [[TMP17]]
-; X32-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ 1, [[RES_BLOCK]] ]
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 12)
+; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
 ; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
 ; X32-NEXT:    ret i32 [[CONV]]
 ;
@@ -1553,78 +801,11 @@ define i32 @cmp_eq12(i8* nocapture reado
 }
 
 define i32 @cmp_eq13(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp_eq13(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; X32-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X32:       res_block:
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 1
-; X32-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 1
-; X32-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X32-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X32-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X32-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP14:%.*]] = getelementptr i32, i32* [[TMP12]], i32 2
-; X32-NEXT:    [[TMP15:%.*]] = getelementptr i32, i32* [[TMP13]], i32 2
-; X32-NEXT:    [[TMP16:%.*]] = load i32, i32* [[TMP14]]
-; X32-NEXT:    [[TMP17:%.*]] = load i32, i32* [[TMP15]]
-; X32-NEXT:    [[TMP18:%.*]] = icmp ne i32 [[TMP16]], [[TMP17]]
-; X32-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[LOADBB3:%.*]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP19:%.*]] = getelementptr i8, i8* [[X]], i8 12
-; X32-NEXT:    [[TMP20:%.*]] = getelementptr i8, i8* [[Y]], i8 12
-; X32-NEXT:    [[TMP21:%.*]] = load i8, i8* [[TMP19]]
-; X32-NEXT:    [[TMP22:%.*]] = load i8, i8* [[TMP20]]
-; X32-NEXT:    [[TMP23:%.*]] = icmp ne i8 [[TMP21]], [[TMP22]]
-; X32-NEXT:    br i1 [[TMP23]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB3]] ], [ 1, [[RES_BLOCK]] ]
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X32-NEXT:    ret i32 [[CONV]]
-;
-; X64-LABEL: @cmp_eq13(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = icmp ne i64 [[TMP2]], [[TMP3]]
-; X64-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X64:       res_block:
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X64-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X64-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 2
-; X64-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 2
-; X64-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X64-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X64-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X64-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP12:%.*]] = getelementptr i8, i8* [[X]], i8 12
-; X64-NEXT:    [[TMP13:%.*]] = getelementptr i8, i8* [[Y]], i8 12
-; X64-NEXT:    [[TMP14:%.*]] = load i8, i8* [[TMP12]]
-; X64-NEXT:    [[TMP15:%.*]] = load i8, i8* [[TMP13]]
-; X64-NEXT:    [[TMP16:%.*]] = icmp ne i8 [[TMP14]], [[TMP15]]
-; X64-NEXT:    br i1 [[TMP16]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ 1, [[RES_BLOCK]] ]
-; X64-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; X64-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X64-NEXT:    ret i32 [[CONV]]
+; ALL-LABEL: @cmp_eq13(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 13)
+; ALL-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
+; ALL-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
+; ALL-NEXT:    ret i32 [[CONV]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 13)
   %cmp = icmp eq i32 %call, 0
@@ -1633,82 +814,11 @@ define i32 @cmp_eq13(i8* nocapture reado
 }
 
 define i32 @cmp_eq14(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp_eq14(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; X32-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X32:       res_block:
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 1
-; X32-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 1
-; X32-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X32-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X32-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X32-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP14:%.*]] = getelementptr i32, i32* [[TMP12]], i32 2
-; X32-NEXT:    [[TMP15:%.*]] = getelementptr i32, i32* [[TMP13]], i32 2
-; X32-NEXT:    [[TMP16:%.*]] = load i32, i32* [[TMP14]]
-; X32-NEXT:    [[TMP17:%.*]] = load i32, i32* [[TMP15]]
-; X32-NEXT:    [[TMP18:%.*]] = icmp ne i32 [[TMP16]], [[TMP17]]
-; X32-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[LOADBB3:%.*]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[X]] to i16*
-; X32-NEXT:    [[TMP20:%.*]] = bitcast i8* [[Y]] to i16*
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i16, i16* [[TMP19]], i16 6
-; X32-NEXT:    [[TMP22:%.*]] = getelementptr i16, i16* [[TMP20]], i16 6
-; X32-NEXT:    [[TMP23:%.*]] = load i16, i16* [[TMP21]]
-; X32-NEXT:    [[TMP24:%.*]] = load i16, i16* [[TMP22]]
-; X32-NEXT:    [[TMP25:%.*]] = icmp ne i16 [[TMP23]], [[TMP24]]
-; X32-NEXT:    br i1 [[TMP25]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB3]] ], [ 1, [[RES_BLOCK]] ]
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X32-NEXT:    ret i32 [[CONV]]
-;
-; X64-LABEL: @cmp_eq14(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = icmp ne i64 [[TMP2]], [[TMP3]]
-; X64-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X64:       res_block:
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X64-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X64-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 2
-; X64-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 2
-; X64-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X64-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X64-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X64-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i16*
-; X64-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i16*
-; X64-NEXT:    [[TMP14:%.*]] = getelementptr i16, i16* [[TMP12]], i16 6
-; X64-NEXT:    [[TMP15:%.*]] = getelementptr i16, i16* [[TMP13]], i16 6
-; X64-NEXT:    [[TMP16:%.*]] = load i16, i16* [[TMP14]]
-; X64-NEXT:    [[TMP17:%.*]] = load i16, i16* [[TMP15]]
-; X64-NEXT:    [[TMP18:%.*]] = icmp ne i16 [[TMP16]], [[TMP17]]
-; X64-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB2]] ], [ 1, [[RES_BLOCK]] ]
-; X64-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; X64-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X64-NEXT:    ret i32 [[CONV]]
+; ALL-LABEL: @cmp_eq14(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 14)
+; ALL-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
+; ALL-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
+; ALL-NEXT:    ret i32 [[CONV]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 14)
   %cmp = icmp eq i32 %call, 0
@@ -1717,52 +827,11 @@ define i32 @cmp_eq14(i8* nocapture reado
 }
 
 define i32 @cmp_eq15(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
-; X32-LABEL: @cmp_eq15(
-; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 15)
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
-; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X32-NEXT:    ret i32 [[CONV]]
-;
-; X64-LABEL: @cmp_eq15(
-; X64-NEXT:  loadbb:
-; X64-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; X64-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i64*
-; X64-NEXT:    [[TMP2:%.*]] = load i64, i64* [[TMP0]]
-; X64-NEXT:    [[TMP3:%.*]] = load i64, i64* [[TMP1]]
-; X64-NEXT:    [[TMP4:%.*]] = icmp ne i64 [[TMP2]], [[TMP3]]
-; X64-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X64:       res_block:
-; X64-NEXT:    br label [[ENDBLOCK:%.*]]
-; X64:       loadbb1:
-; X64-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X64-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X64-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 2
-; X64-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 2
-; X64-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X64-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X64-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X64-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X64:       loadbb2:
-; X64-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i16*
-; X64-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i16*
-; X64-NEXT:    [[TMP14:%.*]] = getelementptr i16, i16* [[TMP12]], i16 6
-; X64-NEXT:    [[TMP15:%.*]] = getelementptr i16, i16* [[TMP13]], i16 6
-; X64-NEXT:    [[TMP16:%.*]] = load i16, i16* [[TMP14]]
-; X64-NEXT:    [[TMP17:%.*]] = load i16, i16* [[TMP15]]
-; X64-NEXT:    [[TMP18:%.*]] = icmp ne i16 [[TMP16]], [[TMP17]]
-; X64-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[LOADBB3:%.*]]
-; X64:       loadbb3:
-; X64-NEXT:    [[TMP19:%.*]] = getelementptr i8, i8* [[X]], i8 14
-; X64-NEXT:    [[TMP20:%.*]] = getelementptr i8, i8* [[Y]], i8 14
-; X64-NEXT:    [[TMP21:%.*]] = load i8, i8* [[TMP19]]
-; X64-NEXT:    [[TMP22:%.*]] = load i8, i8* [[TMP20]]
-; X64-NEXT:    [[TMP23:%.*]] = icmp ne i8 [[TMP21]], [[TMP22]]
-; X64-NEXT:    br i1 [[TMP23]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X64:       endblock:
-; X64-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB3]] ], [ 1, [[RES_BLOCK]] ]
-; X64-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
-; X64-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
-; X64-NEXT:    ret i32 [[CONV]]
+; ALL-LABEL: @cmp_eq15(
+; ALL-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 15)
+; ALL-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
+; ALL-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
+; ALL-NEXT:    ret i32 [[CONV]]
 ;
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 15)
   %cmp = icmp eq i32 %call, 0
@@ -1772,45 +841,8 @@ define i32 @cmp_eq15(i8* nocapture reado
 
 define i32 @cmp_eq16(i8* nocapture readonly %x, i8* nocapture readonly %y)  {
 ; X32-LABEL: @cmp_eq16(
-; X32-NEXT:  loadbb:
-; X32-NEXT:    [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; X32-NEXT:    [[TMP1:%.*]] = bitcast i8* [[Y:%.*]] to i32*
-; X32-NEXT:    [[TMP2:%.*]] = load i32, i32* [[TMP0]]
-; X32-NEXT:    [[TMP3:%.*]] = load i32, i32* [[TMP1]]
-; X32-NEXT:    [[TMP4:%.*]] = icmp ne i32 [[TMP2]], [[TMP3]]
-; X32-NEXT:    br i1 [[TMP4]], label [[RES_BLOCK:%.*]], label [[LOADBB1:%.*]]
-; X32:       res_block:
-; X32-NEXT:    br label [[ENDBLOCK:%.*]]
-; X32:       loadbb1:
-; X32-NEXT:    [[TMP5:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP6:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP7:%.*]] = getelementptr i32, i32* [[TMP5]], i32 1
-; X32-NEXT:    [[TMP8:%.*]] = getelementptr i32, i32* [[TMP6]], i32 1
-; X32-NEXT:    [[TMP9:%.*]] = load i32, i32* [[TMP7]]
-; X32-NEXT:    [[TMP10:%.*]] = load i32, i32* [[TMP8]]
-; X32-NEXT:    [[TMP11:%.*]] = icmp ne i32 [[TMP9]], [[TMP10]]
-; X32-NEXT:    br i1 [[TMP11]], label [[RES_BLOCK]], label [[LOADBB2:%.*]]
-; X32:       loadbb2:
-; X32-NEXT:    [[TMP12:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP13:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP14:%.*]] = getelementptr i32, i32* [[TMP12]], i32 2
-; X32-NEXT:    [[TMP15:%.*]] = getelementptr i32, i32* [[TMP13]], i32 2
-; X32-NEXT:    [[TMP16:%.*]] = load i32, i32* [[TMP14]]
-; X32-NEXT:    [[TMP17:%.*]] = load i32, i32* [[TMP15]]
-; X32-NEXT:    [[TMP18:%.*]] = icmp ne i32 [[TMP16]], [[TMP17]]
-; X32-NEXT:    br i1 [[TMP18]], label [[RES_BLOCK]], label [[LOADBB3:%.*]]
-; X32:       loadbb3:
-; X32-NEXT:    [[TMP19:%.*]] = bitcast i8* [[X]] to i32*
-; X32-NEXT:    [[TMP20:%.*]] = bitcast i8* [[Y]] to i32*
-; X32-NEXT:    [[TMP21:%.*]] = getelementptr i32, i32* [[TMP19]], i32 3
-; X32-NEXT:    [[TMP22:%.*]] = getelementptr i32, i32* [[TMP20]], i32 3
-; X32-NEXT:    [[TMP23:%.*]] = load i32, i32* [[TMP21]]
-; X32-NEXT:    [[TMP24:%.*]] = load i32, i32* [[TMP22]]
-; X32-NEXT:    [[TMP25:%.*]] = icmp ne i32 [[TMP23]], [[TMP24]]
-; X32-NEXT:    br i1 [[TMP25]], label [[RES_BLOCK]], label [[ENDBLOCK]]
-; X32:       endblock:
-; X32-NEXT:    [[PHI_RES:%.*]] = phi i32 [ 0, [[LOADBB3]] ], [ 1, [[RES_BLOCK]] ]
-; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[PHI_RES]], 0
+; X32-NEXT:    [[CALL:%.*]] = tail call i32 @memcmp(i8* [[X:%.*]], i8* [[Y:%.*]], i64 16)
+; X32-NEXT:    [[CMP:%.*]] = icmp eq i32 [[CALL]], 0
 ; X32-NEXT:    [[CONV:%.*]] = zext i1 [[CMP]] to i32
 ; X32-NEXT:    ret i32 [[CONV]]
 ;