derek.holloway
7502bf64a4
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33 lines
1.2 KiB
LLVM
33 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes="print<demanded-bits>,reassociate,bdce" -S < %s | FileCheck %s
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; We want to verify that demanded-bits analysis is invalidated when
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; reassociate is canonicalizing expressions (e.g. putting the constant on the
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; RHS of an OR).
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;
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; Printing demanded-bits will make sure a demanded-bits analysis is cached.
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; Then we run reassociate, followed by bdce. When not invalidating demanded-bits
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; while doing reassociation of the OR, we got this kind of error:
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;
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; Running pass: BDCEPass on foo (4 instructions)
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; While deleting: i1 %cmp1
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; Use still stuck around after Def is destroyed: %or = or i1 %cmp1, true
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; UNREACHABLE executed at ../lib/IR/Value.cpp:102!
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;
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; Check that we get the expected result without failing on assert/unreachable.
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define i1 @foo(i1 %c) {
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; CHECK-LABEL: define i1 @foo(
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; CHECK-SAME: i1 [[C:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[OR:%.*]] = or i1 false, true
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; CHECK-NEXT: [[AND:%.*]] = and i1 [[OR]], [[C]]
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; CHECK-NEXT: ret i1 [[AND]]
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;
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entry:
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%cmp = icmp ne i16 0, 1
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%or = or i1 true, %cmp
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%and = and i1 %c, %or
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ret i1 %and
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}
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