derek.holloway
7502bf64a4
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123 lines
3.6 KiB
LLVM
123 lines
3.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S -o - | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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define float @func1(float %a, float %b, float %c, i1 %cond) {
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; CHECK-LABEL: @func1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.true:
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; CHECK-NEXT: br label [[COND_END:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: br label [[COND_END]]
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; CHECK: cond.end:
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; CHECK-NEXT: [[B_PN:%.*]] = phi float [ [[B:%.*]], [[COND_TRUE]] ], [ [[C:%.*]], [[COND_FALSE]] ]
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; CHECK-NEXT: [[E:%.*]] = fsub fast float [[A:%.*]], [[B_PN]]
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; CHECK-NEXT: ret float [[E]]
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;
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, %b
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br label %cond.end
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cond.false:
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%sub1 = fsub fast float %a, %c
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br label %cond.end
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; The fast-math flags should always be transfered if possible.
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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define float @func2(float %a, float %b, float %c, i1 %cond) {
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; CHECK-LABEL: @func2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.true:
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; CHECK-NEXT: br label [[COND_END:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: br label [[COND_END]]
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; CHECK: cond.end:
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; CHECK-NEXT: [[B_PN:%.*]] = phi float [ [[B:%.*]], [[COND_TRUE]] ], [ [[C:%.*]], [[COND_FALSE]] ]
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; CHECK-NEXT: [[E:%.*]] = fsub float [[A:%.*]], [[B_PN]]
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; CHECK-NEXT: ret float [[E]]
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;
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, %b
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br label %cond.end
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cond.false:
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%sub1 = fsub float %a, %c
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br label %cond.end
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; The fast-math flags should always be transfered if possible.
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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define float @func3(float %a, float %b, float %c, i1 %cond) {
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; CHECK-LABEL: @func3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.true:
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; CHECK-NEXT: br label [[COND_END:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: br label [[COND_END]]
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; CHECK: cond.end:
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; CHECK-NEXT: [[E_IN:%.*]] = phi float [ [[A:%.*]], [[COND_TRUE]] ], [ [[B:%.*]], [[COND_FALSE]] ]
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; CHECK-NEXT: [[E:%.*]] = fadd fast float [[E_IN]], -2.000000e+00
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; CHECK-NEXT: ret float [[E]]
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;
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, 2.0
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br label %cond.end
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cond.false:
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%sub1 = fsub fast float %b, 2.0
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br label %cond.end
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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define float @func4(float %a, float %b, float %c, i1 %cond) {
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; CHECK-LABEL: @func4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.true:
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; CHECK-NEXT: br label [[COND_END:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: br label [[COND_END]]
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; CHECK: cond.end:
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; CHECK-NEXT: [[E_IN:%.*]] = phi float [ [[A:%.*]], [[COND_TRUE]] ], [ [[B:%.*]], [[COND_FALSE]] ]
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; CHECK-NEXT: [[E:%.*]] = fadd float [[E_IN]], -2.000000e+00
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; CHECK-NEXT: ret float [[E]]
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;
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entry:
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br i1 %cond, label %cond.true, label %cond.false
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cond.true:
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%sub0 = fsub fast float %a, 2.0
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br label %cond.end
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cond.false:
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%sub1 = fsub float %b, 2.0
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br label %cond.end
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cond.end:
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%e = phi float [ %sub0, %cond.true ], [ %sub1, %cond.false ]
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ret float %e
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}
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