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07ded31922
This is similar to: https://reviews.llvm.org/rL279958 By not prematurely lowering to loads, we should be able to more easily eliminate the 'or' with zero instructions seen in copysign-constant-magnitude.ll. We should also be able to extend this code to handle vectors. llvm-svn: 282312
45 lines
1.3 KiB
LLVM
45 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-darwin | FileCheck %s
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; CHECK-LABEL: LCPI0_0:
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; CHECK-NEXT: .long 4286578688
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; CHECK-LABEL: LCPI0_1:
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; CHECK-NEXT: .long 2139095040
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define x86_fp80 @foo(x86_fp80 %a) {
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; CHECK-LABEL: foo:
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; CHECK: ## BB#0:
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; CHECK-NEXT: fldt {{[0-9]+}}(%rsp)
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; CHECK-NEXT: fstpt -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: testb $-128, -{{[0-9]+}}(%rsp)
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; CHECK-NEXT: flds LCPI0_0(%rip)
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; CHECK-NEXT: flds LCPI0_1(%rip)
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; CHECK-NEXT: fcmovne %st(1), %st(0)
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; CHECK-NEXT: fstp %st(1)
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; CHECK-NEXT: retq
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;
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%1 = tail call x86_fp80 @copysignl(x86_fp80 0xK7FFF8000000000000000, x86_fp80 %a) nounwind readnone
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ret x86_fp80 %1
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}
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declare x86_fp80 @copysignl(x86_fp80, x86_fp80) nounwind readnone
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; This would crash:
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; https://llvm.org/bugs/show_bug.cgi?id=26070
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define float @pr26070() {
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; CHECK-LABEL: pr26070:
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; CHECK: ## BB#0:
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; CHECK-NEXT: andps {{.*}}(%rip), %xmm1
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; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
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; CHECK-NEXT: shufps {{.*#+}} xmm0 = xmm0[0,0,0,0]
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; CHECK-NEXT: orps %xmm1, %xmm0
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; CHECK-NEXT: retq
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;
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%c = call float @copysignf(float 1.0, float undef) readnone
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ret float %c
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}
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declare float @copysignf(float, float)
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