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-rw-r--r--lib/Transforms/Scalar/TailRecursionElimination.cpp8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/TailRecursionElimination.cpp b/lib/Transforms/Scalar/TailRecursionElimination.cpp
index 5b46007..14c4d8b 100644
--- a/lib/Transforms/Scalar/TailRecursionElimination.cpp
+++ b/lib/Transforms/Scalar/TailRecursionElimination.cpp
@@ -140,6 +140,14 @@ bool TailCallElim::runOnFunction(Function &F) {
FunctionContainsEscapingAllocas |=
CheckForEscapingAllocas(BB, CannotTCETailMarkedCall);
}
+
+ /// FIXME: The code generator produces really bad code when an 'escaping
+ /// alloca' is changed from being a static alloca to being a dynamic alloca.
+ /// Until this is resolved, disable this transformation if that would ever
+ /// happen. This bug is PR962.
+ if (FunctionContainsEscapingAllocas)
+ return false;
+
// Second pass, change any tail calls to loops.
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)