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Tweak the check for promotable alloca's to handle
debug intrinsics correctly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66225 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -81,9 +81,15 @@ bool llvm::isAllocaPromotable(const AllocaInst *AI) {
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if (SI->isVolatile())
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return false;
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} else if (const BitCastInst *BC = dyn_cast<BitCastInst>(*UI)) {
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// Uses by dbg info shouldn't inhibit promotion.
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// A bitcast that does not feed into debug info inhibits promotion.
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if (!BC->hasOneUse() || !isa<DbgInfoIntrinsic>(*BC->use_begin()))
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return false;
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// If the only use is by debug info, this alloca will not exist in
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// non-debug code, so don't try to promote; this ensures the same
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// codegen with debug info. Otherwise, debug info should not
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// inhibit promotion (but we must examine other uses).
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if (AI->hasOneUse())
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return false;
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} else {
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return false;
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}
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