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58 lines
1.7 KiB
LLVM
58 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-linux -mcpu=core2 -verify-machineinstrs | FileCheck %s
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; We were miscompiling this and using %ax instead of %cx in the movw
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; in the following sequence:
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; movswl %cx, %ecx
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; movw %cx, (%rsi)
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; movslq %ecx, %rcx
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;
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; We can't produce the above sequence without special SD-level
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; heuristics. Now we produce this:
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define i32 @f(i1 %foo, i16* %tm_year2, i8* %bar, i16 %zed, i32 %zed2) {
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; CHECK-LABEL: f:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl $-1, %eax
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; CHECK-NEXT: testb $1, %dil
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; CHECK-NEXT: jne .LBB0_2
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; CHECK-NEXT: # %bb.1: # %if.end
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; CHECK-NEXT: movslq %r8d, %rax
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; CHECK-NEXT: imulq $1374389535, %rax, %rcx # imm = 0x51EB851F
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; CHECK-NEXT: movq %rcx, %rdi
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; CHECK-NEXT: shrq $63, %rdi
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; CHECK-NEXT: sarq $37, %rcx
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; CHECK-NEXT: addl %edi, %ecx
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; CHECK-NEXT: imull $100, %ecx, %ecx
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; CHECK-NEXT: subl %ecx, %eax
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; CHECK-NEXT: movw %ax, (%rsi)
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; CHECK-NEXT: cwtl
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; CHECK-NEXT: cltq
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; CHECK-NEXT: imulq $1717986919, %rax, %rax # imm = 0x66666667
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; CHECK-NEXT: movq %rax, %rcx
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; CHECK-NEXT: shrq $63, %rcx
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; CHECK-NEXT: shrq $34, %rax
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; CHECK-NEXT: addl %ecx, %eax
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; CHECK-NEXT: movb %al, (%rdx)
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: .LBB0_2: # %return
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; CHECK-NEXT: retq
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entry:
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br i1 %foo, label %return, label %if.end
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if.end:
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%rem = srem i32 %zed2, 100
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%conv3 = trunc i32 %rem to i16
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store i16 %conv3, i16* %tm_year2
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%sext = shl i32 %rem, 16
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%conv5 = ashr exact i32 %sext, 16
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%div = sdiv i32 %conv5, 10
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%conv6 = trunc i32 %div to i8
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store i8 %conv6, i8* %bar
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br label %return
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return:
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%retval.0 = phi i32 [ 0, %if.end ], [ -1, %entry ]
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ret i32 %retval.0
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}
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