derek.holloway
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46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=guard-widening < %s | FileCheck %s
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declare void @llvm.experimental.deoptimize.isVoid(...)
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declare i1 @llvm.experimental.widenable.condition()
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; In the current scheme we widen `br i1 %and1`, so we try to build
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; `and i1 poison, %and1` using `%call0` as insertion point.
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; That's not possible, so widening will not occur in the case.
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; TODO: Widen `%call0` in the test case, not a branch.
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define void @test() {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: bb0:
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; CHECK-NEXT: [[CALL0:%.*]] = call i1 @llvm.experimental.widenable.condition()
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; CHECK-NEXT: [[AND0:%.*]] = and i1 false, [[CALL0]]
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; CHECK-NEXT: [[AND1:%.*]] = and i1 false, [[AND0]]
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; CHECK-NEXT: br i1 [[AND1]], label [[BB1:%.*]], label [[DEOPT:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[CALL1:%.*]] = call i1 @llvm.experimental.widenable.condition()
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; CHECK-NEXT: [[AND2:%.*]] = and i1 poison, [[CALL1]]
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; CHECK-NEXT: br i1 [[AND2]], label [[UNREACH:%.*]], label [[DEOPT]]
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; CHECK: unreach:
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; CHECK-NEXT: unreachable
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; CHECK: deopt:
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; CHECK-NEXT: call void (...) @llvm.experimental.deoptimize.isVoid(i32 0) [ "deopt"(i32 0) ]
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; CHECK-NEXT: ret void
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;
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bb0:
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%call0 = call i1 @llvm.experimental.widenable.condition()
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%and0 = and i1 false, %call0
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%and1 = and i1 false, %and0
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br i1 %and1, label %bb1, label %deopt
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bb1:
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%call1 = call i1 @llvm.experimental.widenable.condition()
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%and2 = and i1 poison, %call1
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br i1 %and2, label %unreach, label %deopt
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unreach:
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unreachable
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deopt:
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call void (...) @llvm.experimental.deoptimize.isVoid(i32 0) [ "deopt"(i32 0) ]
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ret void
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}
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