[PATCH] D94934: [llvm] Prevent infinite loop in InstCombine of select statements
Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Jan 19 01:32:16 PST 2021
This revision was automatically updated to reflect the committed changes.
Closed by commit rGa003f26539cf: [llvm] Prevent infinite loop in InstCombine of select statements (authored by Tres Popp <tpopp at google.com>).
Changed prior to commit:
https://reviews.llvm.org/D94934?vs=317422&id=317485#toc
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D94934/new/
https://reviews.llvm.org/D94934
Files:
llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
Index: llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
===================================================================
--- llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -1123,7 +1123,7 @@
// else. Only do this if CmpRHS is a constant, as profitability is not
// clear for other cases.
// FIXME: The replacement could be performed recursively.
- if (isa<Constant>(CmpRHS) && !isa<ConstantExpr>(CmpRHS))
+ if (match(CmpRHS, m_ImmConstant()) && !match(CmpLHS, m_ImmConstant()))
if (auto *I = dyn_cast<Instruction>(TrueVal))
if (I->hasOneUse())
for (Use &U : I->operands())
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