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b36dd6007b
The code has bugs dealing with -0.0. Since D44550 introduced FABS pattern folding in InstCombine, this patch removes the now-redundant code that causes https://bugs.llvm.org/show_bug.cgi?id=36600. Patch by Mikhail Dvoretckii! Differential Revision: https://reviews.llvm.org/D44683 llvm-svn: 328872
52 lines
1.5 KiB
LLVM
52 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=-sse,-sse2,-sse3 | FileCheck %s --check-prefix=X87
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; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=-sse,-sse2,-sse3 -enable-unsafe-fp-math -enable-no-nans-fp-math | FileCheck %s --check-prefix=X87UNSAFE
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=X64
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declare float @fabsf(float)
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declare x86_fp80 @fabsl(x86_fp80)
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define float @test1(float %X) {
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; X87-LABEL: test1:
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; X87: # %bb.0:
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; X87-NEXT: flds {{[0-9]+}}(%esp)
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; X87-NEXT: fabs
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; X87-NEXT: retl
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;
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; X87UNSAFE-LABEL: test1:
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; X87UNSAFE: # %bb.0:
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; X87UNSAFE-NEXT: flds {{[0-9]+}}(%esp)
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; X87UNSAFE-NEXT: fabs
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; X87UNSAFE-NEXT: retl
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;
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; X64-LABEL: test1:
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; X64: # %bb.0:
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; X64-NEXT: andps {{.*}}(%rip), %xmm0
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; X64-NEXT: retq
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%Y = call float @fabsf(float %X) readnone
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ret float %Y
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}
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define x86_fp80 @test2(x86_fp80 %X) {
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; X87-LABEL: test2:
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; X87: # %bb.0:
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; X87-NEXT: fldt {{[0-9]+}}(%esp)
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; X87-NEXT: fabs
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; X87-NEXT: retl
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;
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; X87UNSAFE-LABEL: test2:
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; X87UNSAFE: # %bb.0:
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; X87UNSAFE-NEXT: fldt {{[0-9]+}}(%esp)
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; X87UNSAFE-NEXT: fabs
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; X87UNSAFE-NEXT: retl
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;
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; X64-LABEL: test2:
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; X64: # %bb.0:
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; X64-NEXT: fldt {{[0-9]+}}(%rsp)
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; X64-NEXT: fabs
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; X64-NEXT: retq
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%Y = call x86_fp80 @fabsl(x86_fp80 %X) readnone
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ret x86_fp80 %Y
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}
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