42 lines
1.4 KiB
LLVM
42 lines
1.4 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple x86_64 < %s | FileCheck %s
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; To ensure unused floating point constant is correctly removed
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define float @test(float %src, float* %p) {
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; CHECK-LABEL: test:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movq $0, (%rdi)
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; CHECK-NEXT: xorps %xmm0, %xmm0
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; CHECK-NEXT: retq
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entry:
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%a0 = getelementptr inbounds float, float* %p, i32 0
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%a1 = getelementptr inbounds float, float* %p, i32 1
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store float 0.000000e+00, float* %a0
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store float 0.000000e+00, float* %a1
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%zero = load float, float* %a0
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%fmul1 = fmul fast float %zero, %src
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%fadd1 = fadd fast float %fmul1, %zero
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%fmul2 = fmul fast float %fadd1, 2.000000e+00
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%fmul3 = fmul fast float %fmul2, %fmul2
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%fmul4 = fmul fast float %fmul2, 2.000000e+00
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%fadd2 = fadd fast float %fmul4, -3.000000e+00
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%fmul5 = fmul fast float %fadd2, %fmul2
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%fadd3 = fadd fast float %fmul2, %src
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%fadd4 = fadd fast float %fadd3, %fmul5
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%fmul6 = fmul fast float %fmul3, %fadd4
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ret float %fmul6
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}
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; To ensure negated result will not be removed when NegX=NegY and
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; NegX is needed
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define float @test2(float %x, float %y) {
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%add = fadd fast float %x, 750.0
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%sub = fsub fast float %x, %add
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%mul = fmul fast float %sub, %sub
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%mul2 = fmul fast float %mul, %sub
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%add2 = fadd fast float %mul2, 1.0
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%add3 = fadd fast float %mul2, %add2
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%mul3 = fmul fast float %y, %add3
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ret float %mul3
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}
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