68 lines
2.0 KiB
LLVM
68 lines
2.0 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -sccp -S %s | FileCheck %s
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; When marking the edge from bb2 -> exit as executable first, %p will be NaN
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; first and %v.1 will simplify to NaN. But when marking bb1 -> exit executable,
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; %p will we overdefined and %v.1 will be simplified to 0.0. Make sure we go to
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; overdefined, instead of crashing.
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; TODO: Can we do better, i.e. choose the 'conservative' 0.0 initially?
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define float @test1(float %a, i1 %bc) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[BC:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[P:%.*]] = phi float [ [[A:%.*]], [[BB1]] ], [ 0x7FF8000000000000, [[BB2]] ]
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; CHECK-NEXT: [[V_1:%.*]] = fmul float [[P]], 0.000000e+00
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; CHECK-NEXT: [[V_2:%.*]] = fadd float [[V_1]], 0xFFF8000000000000
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; CHECK-NEXT: ret float [[V_2]]
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;
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entry:
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br i1 %bc, label %bb1, label %bb2
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bb1:
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br label %exit
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bb2:
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br label %exit
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exit:
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%p = phi float [ %a, %bb1 ], [ 0x7FF8000000000000, %bb2 ]
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%v.1 = fmul float %p, 0.000000e+00
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%v.2 = fadd float %v.1, 0xFFF8000000000000
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ret float %v.2
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}
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; Same as @test1, but with the incoming values switched.
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define float @test2(float %a, i1 %bc) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[BC:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: [[P:%.*]] = phi float [ 0x7FF8000000000000, [[BB1]] ], [ [[A:%.*]], [[BB2]] ]
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; CHECK-NEXT: [[V_1:%.*]] = fmul float [[P]], 0.000000e+00
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; CHECK-NEXT: ret float 0xFFF8000000000000
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;
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entry:
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br i1 %bc, label %bb1, label %bb2
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bb1:
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br label %exit
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bb2:
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br label %exit
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exit:
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%p = phi float [ 0x7FF8000000000000, %bb1 ], [ %a, %bb2 ]
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%v.1 = fmul float %p, 0.000000e+00
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%v.2 = fadd float %v.1, 0xFFF8000000000000
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ret float %v.2
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}
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