[llvm] r355258 - Add test case for truncate funnel shifts. NFC

[Amaury Sechet via llvm-commits]

Author: deadalnix
Date: Fri Mar  1 18:24:36 2019
New Revision: 355258

URL: http://llvm.org/viewvc/llvm-project?rev=355258&view=rev
Log:
Add test case for truncate funnel shifts. NFC

Modified:
    llvm/trunk/test/CodeGen/X86/shift-double-x86_64.ll
    llvm/trunk/test/CodeGen/X86/shift-double.ll

Modified: llvm/trunk/test/CodeGen/X86/shift-double-x86_64.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/shift-double-x86_64.ll?rev=355258&r1=355257&r2=355258&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/shift-double-x86_64.ll (original)
+++ llvm/trunk/test/CodeGen/X86/shift-double-x86_64.ll Fri Mar  1 18:24:36 2019
@@ -114,3 +114,26 @@ define i64 @test7(i64 %hi, i64 %lo, i64
   %sh = or i64 %sh_lo, %sh_hi
   ret i64 %sh
 }
+
+define i64 @test8(i64 %hi, i64 %lo, i64 %bits) nounwind {
+; CHECK-LABEL: test8:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    movq %rdi, %rax
+; CHECK-NEXT:    movl %edx, %ecx
+; CHECK-NEXT:    andb $63, %cl
+; CHECK-NEXT:    negb %cl
+; CHECK-NEXT:    shrq %cl, %rsi
+; CHECK-NEXT:    movl %edx, %ecx
+; CHECK-NEXT:    shlq %cl, %rax
+; CHECK-NEXT:    orq %rsi, %rax
+; CHECK-NEXT:    retq
+  %tbits = trunc i64 %bits to i8
+  %tand = and i8 %tbits, 63
+  %tand64 = sub i8 64, %tand
+  %and = zext i8 %tand to i64
+  %and64 = zext i8 %tand64 to i64
+  %sh_lo = lshr i64 %lo, %and64
+  %sh_hi = shl i64 %hi, %and
+  %sh = or i64 %sh_lo, %sh_hi
+  ret i64 %sh
+}

Modified: llvm/trunk/test/CodeGen/X86/shift-double.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/shift-double.ll?rev=355258&r1=355257&r2=355258&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/shift-double.ll (original)
+++ llvm/trunk/test/CodeGen/X86/shift-double.ll Fri Mar  1 18:24:36 2019
@@ -459,6 +459,45 @@ define i32 @test17(i32 %hi, i32 %lo, i32
   ret i32 %sh
 }
 
+define i32 @test18(i32 %hi, i32 %lo, i32 %bits) nounwind {
+; X86-LABEL: test18:
+; X86:       # %bb.0:
+; X86-NEXT:    pushl %esi
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %dl
+; X86-NEXT:    movl %edx, %ecx
+; X86-NEXT:    andb $31, %cl
+; X86-NEXT:    negb %cl
+; X86-NEXT:    shrl %cl, %esi
+; X86-NEXT:    movl %edx, %ecx
+; X86-NEXT:    shll %cl, %eax
+; X86-NEXT:    orl %esi, %eax
+; X86-NEXT:    popl %esi
+; X86-NEXT:    retl
+;
+; X64-LABEL: test18:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    movl %edx, %ecx
+; X64-NEXT:    andb $31, %cl
+; X64-NEXT:    negb %cl
+; X64-NEXT:    shrl %cl, %esi
+; X64-NEXT:    movl %edx, %ecx
+; X64-NEXT:    shll %cl, %eax
+; X64-NEXT:    orl %esi, %eax
+; X64-NEXT:    retq
+  %tbits = trunc i32 %bits to i8
+  %tand = and i8 %tbits, 31
+  %tand64 = sub i8 32, %tand
+  %and = zext i8 %tand to i32
+  %and64 = zext i8 %tand64 to i32
+  %sh_lo = lshr i32 %lo, %and64
+  %sh_hi = shl i32 %hi, %and
+  %sh = or i32 %sh_lo, %sh_hi
+  ret i32 %sh
+}
+
 ; PR34641 - Masked Shift Counts
 
 define i32 @shld_safe_i32(i32, i32, i32) {