[llvm] r350150 - [X86] Add test case from PR38217. NFC

[Craig Topper via llvm-commits]

Author: ctopper
Date: Fri Dec 28 23:14:30 2018
New Revision: 350150

URL: http://llvm.org/viewvc/llvm-project?rev=350150&view=rev
Log:
[X86] Add test case from PR38217. NFC

Added:
    llvm/trunk/test/CodeGen/X86/pr38217.ll

Added: llvm/trunk/test/CodeGen/X86/pr38217.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/pr38217.ll?rev=350150&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/pr38217.ll (added)
+++ llvm/trunk/test/CodeGen/X86/pr38217.ll Fri Dec 28 23:14:30 2018
@@ -0,0 +1,79 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
+
+ at _ZL11DIGIT_TABLE = constant [201 x i8] c"00010203040506070809101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899\00", align 16
+
+define void @_Z12d2s_bufferedmPc(i64, i8* nocapture) {
+; CHECK-LABEL: _Z12d2s_bufferedmPc:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cmpq $10000, %rdi # imm = 0x2710
+; CHECK-NEXT:    jb .LBB0_3
+; CHECK-NEXT:  # %bb.1: # %.preheader
+; CHECK-NEXT:    movq %rdi, %r9
+; CHECK-NEXT:    xorl %r10d, %r10d
+; CHECK-NEXT:    movabsq $3777893186295716171, %r8 # imm = 0x346DC5D63886594B
+; CHECK-NEXT:    .p2align 4, 0x90
+; CHECK-NEXT:  .LBB0_2: # =>This Inner Loop Header: Depth=1
+; CHECK-NEXT:    movq %r9, %rax
+; CHECK-NEXT:    mulq %r8
+; CHECK-NEXT:    shrq $11, %rdx
+; CHECK-NEXT:    imulq $10000, %rdx, %rax # imm = 0x2710
+; CHECK-NEXT:    movq %r9, %rdi
+; CHECK-NEXT:    subq %rax, %rdi
+; CHECK-NEXT:    imulq $1374389535, %rdi, %rcx # imm = 0x51EB851F
+; CHECK-NEXT:    movq %rcx, %rax
+; CHECK-NEXT:    shrq $37, %rax
+; CHECK-NEXT:    imull $100, %eax, %eax
+; CHECK-NEXT:    subl %eax, %edi
+; CHECK-NEXT:    shrq $36, %rcx
+; CHECK-NEXT:    andl $510, %ecx # imm = 0x1FE
+; CHECK-NEXT:    movl %r10d, %r11d
+; CHECK-NEXT:    movq %rsi, %rax
+; CHECK-NEXT:    subq %r11, %rax
+; CHECK-NEXT:    movzwl _ZL11DIGIT_TABLE(%rdi,%rdi), %edi
+; CHECK-NEXT:    movw %di, -1(%rax)
+; CHECK-NEXT:    movzwl _ZL11DIGIT_TABLE(%rcx), %ecx
+; CHECK-NEXT:    movw %cx, -3(%rax)
+; CHECK-NEXT:    addl $4, %r10d
+; CHECK-NEXT:    cmpq $99999999, %r9 # imm = 0x5F5E0FF
+; CHECK-NEXT:    movq %rdx, %r9
+; CHECK-NEXT:    ja .LBB0_2
+; CHECK-NEXT:  .LBB0_3:
+; CHECK-NEXT:    retq
+  %3 = icmp ugt i64 %0, 9999
+  br i1 %3, label %4, label %31
+
+; <label>:4:                                      ; preds = %2, %4
+  %5 = phi i64 [ %9, %4 ], [ %0, %2 ]
+  %6 = phi i32 [ %29, %4 ], [ 0, %2 ]
+  %7 = urem i64 %5, 10000
+  %8 = trunc i64 %7 to i32
+  %9 = udiv i64 %5, 10000
+  %10 = urem i32 %8, 100
+  %11 = shl nuw nsw i32 %10, 1
+  %12 = udiv i32 %8, 100
+  %13 = shl nuw nsw i32 %12, 1
+  %14 = zext i32 %6 to i64
+  %15 = sub nsw i64 0, %14
+  %16 = getelementptr inbounds i8, i8* %1, i64 %15
+  %17 = getelementptr inbounds i8, i8* %16, i64 -1
+  %18 = zext i32 %11 to i64
+  %19 = getelementptr inbounds [201 x i8], [201 x i8]* @_ZL11DIGIT_TABLE, i64 0, i64 %18
+  %20 = bitcast i8* %19 to i16*
+  %21 = bitcast i8* %17 to i16*
+  %22 = load i16, i16* %20, align 2
+  store i16 %22, i16* %21, align 1
+  %23 = getelementptr inbounds i8, i8* %16, i64 -3
+  %24 = zext i32 %13 to i64
+  %25 = getelementptr inbounds [201 x i8], [201 x i8]* @_ZL11DIGIT_TABLE, i64 0, i64 %24
+  %26 = bitcast i8* %25 to i16*
+  %27 = bitcast i8* %23 to i16*
+  %28 = load i16, i16* %26, align 2
+  store i16 %28, i16* %27, align 1
+  %29 = add i32 %6, 4
+  %30 = icmp ugt i64 %5, 99999999
+  br i1 %30, label %4, label %31
+
+; <label>:31:                                     ; preds = %4, %2
+  ret void
+}