derek.holloway
7502bf64a4
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37 lines
1.3 KiB
LLVM
37 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=reassociate -S | FileCheck %s
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; Check that a*a*b+a*a*c is turned into a*(a*(b+c)).
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define float @fmultistep1(float %a, float %b, float %c) {
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; CHECK-LABEL: @fmultistep1(
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; CHECK-NEXT: [[REASS_ADD1:%.*]] = fadd fast float [[C:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[REASS_MUL2:%.*]] = fmul fast float [[A:%.*]], [[A]]
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; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_MUL2]], [[REASS_ADD1]]
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; CHECK-NEXT: ret float [[REASS_MUL]]
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;
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%t0 = fmul fast float %a, %b
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%t1 = fmul fast float %a, %t0 ; a*(a*b)
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%t2 = fmul fast float %a, %c
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%t3 = fmul fast float %a, %t2 ; a*(a*c)
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%t4 = fadd fast float %t1, %t3
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ret float %t4
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}
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; Check that a*b+a*c+d is turned into a*(b+c)+d.
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define float @fmultistep2(float %a, float %b, float %c, float %d) {
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; CHECK-LABEL: @fmultistep2(
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; CHECK-NEXT: [[REASS_ADD:%.*]] = fadd fast float [[C:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_ADD]], [[A:%.*]]
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; CHECK-NEXT: [[T3:%.*]] = fadd fast float [[REASS_MUL]], [[D:%.*]]
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; CHECK-NEXT: ret float [[T3]]
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;
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%t0 = fmul fast float %a, %b
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%t1 = fmul fast float %a, %c
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%t2 = fadd fast float %t1, %d ; a*c+d
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%t3 = fadd fast float %t0, %t2 ; a*b+(a*c+d)
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ret float %t3
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}
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