derek.holloway
7502bf64a4
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34 lines
1.2 KiB
LLVM
34 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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; RUN: llc -mtriple=x86_64-- --start-before=x86-isel -mattr=+avx,+fma %s -o - | FileCheck %s
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define double @fma_folding(double %x) {
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; CHECK-LABEL: fma_folding:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vmovsd {{.*#+}} xmm0 = [1.0E+0,0.0E+0]
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; CHECK-NEXT: retq
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%prod = fmul contract ninf nnan double %x, 0.0
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%fused = fadd contract ninf nnan double %prod, 1.0
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ret double %fused
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}
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define double @fma_no_folding(double %x) {
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; CHECK-LABEL: fma_no_folding:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vxorpd %xmm1, %xmm1, %xmm1
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; CHECK-NEXT: vfmadd213sd {{.*#+}} xmm0 = (xmm1 * xmm0) + mem
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; CHECK-NEXT: retq
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%fused = call contract nnan ninf double @llvm.fma.f64(double %x, double 0.0, double -0.0)
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ret double %fused
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}
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define double @fma_no_fold_potential_nan(double %x) {
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; CHECK-LABEL: fma_no_fold_potential_nan:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vxorpd %xmm1, %xmm1, %xmm1
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; CHECK-NEXT: vfmadd213sd {{.*#+}} xmm0 = (xmm1 * xmm0) + mem
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; CHECK-NEXT: retq
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%fused = call contract double @llvm.fma.f64(double %x, double 0.0, double 1.0)
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ret double %fused
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}
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