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PeepholeOpt: Remove subreg def check for insert_subreg #130085

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Merged
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Mar 7, 2025
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PeepholeOpt: Remove subreg def check for insert_subreg #130085

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7 changes: 1 addition & 6 deletions llvm/lib/CodeGen/PeepholeOptimizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2028,12 +2028,7 @@ ValueTrackerResult ValueTracker::getNextSourceFromRegSequence() {
ValueTrackerResult ValueTracker::getNextSourceFromInsertSubreg() {
assert((Def->isInsertSubreg() || Def->isInsertSubregLike()) &&
"Invalid definition");

if (Def->getOperand(DefIdx).getSubReg())
// If we are composing subreg, bail out.
// Same remark as getNextSourceFromRegSequence.
// I.e., this may be turned into an assert.
return ValueTrackerResult();
assert(!Def->getOperand(DefIdx).getSubReg() && "no subreg defs in SSA");

RegSubRegPair BaseReg;
RegSubRegPairAndIdx InsertedReg;
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