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25 lines
784 B
25 lines
784 B
7 months ago
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -enable-unsafe-fp-math -enable-no-signed-zeros-fp-math -mtriple=x86_64-unknown-unknown | FileCheck %s
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; Make sure that vectors get the same benefits as scalars when using unsafe-fp-math.
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; Subtracting zero is free.
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define <4 x float> @vec_fsub_zero(<4 x float> %x) {
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; CHECK-LABEL: vec_fsub_zero:
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; CHECK: # %bb.0:
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; CHECK-NEXT: retq
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%sub = fsub <4 x float> %x, zeroinitializer
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ret <4 x float> %sub
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}
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; Negating doesn't require subtraction.
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define <4 x float> @vec_fneg(<4 x float> %x) {
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; CHECK-LABEL: vec_fneg:
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; CHECK: # %bb.0:
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; CHECK-NEXT: xorps {{.*}}(%rip), %xmm0
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; CHECK-NEXT: retq
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%sub = fsub <4 x float> zeroinitializer, %x
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ret <4 x float> %sub
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}
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