Reapply r121886, and also update DecomposeGEPExpression to keep
it in sync.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121895 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp
index ae253ab..7506295 100644
--- a/lib/Analysis/ValueTracking.cpp
+++ b/lib/Analysis/ValueTracking.cpp
@@ -1441,6 +1441,14 @@
return V;
V = GA->getAliasee();
} else {
+ // See if InstructionSimplify knows any relevant tricks.
+ if (Instruction *I = dyn_cast<Instruction>(V))
+ // TODO: Aquire TargetData and DominatorTree and use them.
+ if (Value *Simplified = SimplifyInstruction(I, 0, 0)) {
+ V = Simplified;
+ continue;
+ }
+
return V;
}
assert(V->getType()->isPointerTy() && "Unexpected operand type!");