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43 lines
1.6 KiB
LLVM
43 lines
1.6 KiB
LLVM
; RUN: opt -reassociate %s -S | FileCheck %s
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define float @foo(float %a,float %b, float %c) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: [[MUL3:%.*]] = fmul float %a, %b
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; CHECK-NEXT: [[FACTOR:%.*]] = fmul fast float %c, 2.000000e+00
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; CHECK-NEXT: [[REASS_ADD1:%.*]] = fadd fast float [[FACTOR]], %b
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; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_ADD1]], %a
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; CHECK-NEXT: [[ADD3:%.*]] = fadd fast float [[REASS_MUL]], [[MUL3]]
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; CHECK-NEXT: ret float [[ADD3]]
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;
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%mul1 = fmul fast float %a, %c
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%mul2 = fmul fast float %a, %b
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%mul3 = fmul float %a, %b ; STRICT
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%mul4 = fmul fast float %a, %c
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%add1 = fadd fast float %mul1, %mul3
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%add2 = fadd fast float %mul4, %mul2
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%add3 = fadd fast float %add1, %add2
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ret float %add3
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}
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define float @foo_reassoc(float %a,float %b, float %c) {
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; CHECK-LABEL: @foo_reassoc(
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; CHECK-NEXT: [[MUL1:%.*]] = fmul reassoc float %a, %c
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; CHECK-NEXT: [[MUL2:%.*]] = fmul fast float %b, %a
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; CHECK-NEXT: [[MUL3:%.*]] = fmul float %a, %b
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; CHECK-NEXT: [[MUL4:%.*]] = fmul reassoc float %a, %c
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; CHECK-NEXT: [[ADD1:%.*]] = fadd fast float [[MUL1]], [[MUL3]]
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; CHECK-NEXT: [[ADD2:%.*]] = fadd reassoc float [[MUL2]], [[MUL4]]
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; CHECK-NEXT: [[ADD3:%.*]] = fadd fast float [[ADD1]], [[ADD2]]
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; CHECK-NEXT: ret float [[ADD3]]
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;
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%mul1 = fmul reassoc float %a, %c
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%mul2 = fmul fast float %a, %b
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%mul3 = fmul float %a, %b ; STRICT
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%mul4 = fmul reassoc float %a, %c
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%add1 = fadd fast float %mul1, %mul3
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%add2 = fadd reassoc float %mul4, %mul2
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%add3 = fadd fast float %add1, %add2
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ret float %add3
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}
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