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In rememberInstruction, if the value being remembered is the
current insertion point, advance the current insertion point. This avoids a use-before-def situation in a testcase extracted from clang which is difficult to reduce to a reasonable-sized regression test. llvm-svn: 96151
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@ -168,9 +168,7 @@ namespace llvm {
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return S->getValue();
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}
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void rememberInstruction(Value *I) {
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if (!PostIncLoop) InsertedValues.insert(I);
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}
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void rememberInstruction(Value *I);
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Value *expandAddRecExprLiterally(const SCEVAddRecExpr *);
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PHINode *getAddRecExprPHILiterally(const SCEVAddRecExpr *Normalized,
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@ -1075,6 +1075,20 @@ Value *SCEVExpander::expand(const SCEV *S) {
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return V;
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}
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void SCEVExpander::rememberInstruction(Value *I) {
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if (!PostIncLoop)
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InsertedValues.insert(I);
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// If we just claimed an existing instruction and that instruction had
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// been the insert point, adjust the insert point forward so that
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// subsequently inserted code will be dominated.
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if (Builder.GetInsertPoint() == I) {
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BasicBlock::iterator It = cast<Instruction>(I);
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do { ++It; } while (isInsertedInstruction(It));
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Builder.SetInsertPoint(Builder.GetInsertBlock(), It);
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}
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}
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/// getOrInsertCanonicalInductionVariable - This method returns the
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/// canonical induction variable of the specified type for the specified
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/// loop (inserting one if there is none). A canonical induction variable
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