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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96151 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index 5de55fe..88c22b1 100644
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -1075,6 +1075,20 @@
return V;
}
+void SCEVExpander::rememberInstruction(Value *I) {
+ if (!PostIncLoop)
+ InsertedValues.insert(I);
+
+ // If we just claimed an existing instruction and that instruction had
+ // been the insert point, adjust the insert point forward so that
+ // subsequently inserted code will be dominated.
+ if (Builder.GetInsertPoint() == I) {
+ BasicBlock::iterator It = cast<Instruction>(I);
+ do { ++It; } while (isInsertedInstruction(It));
+ Builder.SetInsertPoint(Builder.GetInsertBlock(), It);
+ }
+}
+
/// getOrInsertCanonicalInductionVariable - This method returns the
/// canonical induction variable of the specified type for the specified
/// loop (inserting one if there is none). A canonical induction variable