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| author | Tom Stellard <tstellar@redhat.com> | 2020-05-09 00:34:05 +0000 |
|---|---|---|
| committer | Tom Stellard <tstellar@redhat.com> | 2020-06-23 18:45:59 -0700 |
| commit | be4501f6e487fc27b242e0799cfeed3b4eedc4cd (patch) | |
| tree | 3503f839ef829602339d4fa290c4e13ea4a90eda /llvm/lib | |
| parent | 28a6713e107c9f878cb6c59db8548bb732dcc79d (diff) | |
| download | bcm5719-llvm-be4501f6e487fc27b242e0799cfeed3b4eedc4cd.tar.gz bcm5719-llvm-be4501f6e487fc27b242e0799cfeed3b4eedc4cd.zip | |
[InstCombine] prevent infinite loop with sub/abs of constant expression
PR45539:
https://bugs.llvm.org/show_bug.cgi?id=45539
(cherry picked from commit 01bcc3e9371470e1974f066ced353df15e10056d)
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp index ec976a971e3..23561c25c50 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp @@ -1768,7 +1768,7 @@ Instruction *InstCombiner::visitSub(BinaryOperator &I) { Constant *C2; // C-(C2-X) --> X+(C-C2) - if (match(Op1, m_Sub(m_Constant(C2), m_Value(X)))) + if (match(Op1, m_Sub(m_Constant(C2), m_Value(X))) && !isa<ConstantExpr>(C2)) return BinaryOperator::CreateAdd(X, ConstantExpr::getSub(C, C2)); // C-(X+C2) --> (C-C2)-X |
