Speculatively disable x86 automatic tail call optimization while we track down a self-hosting issue.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95259 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 9d6b5a3..2b5ff3c 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -52,6 +52,7 @@
STATISTIC(NumTailCalls, "Number of tail calls");
+static cl::opt<unsigned> TailCallLimit("tailcall-limit", cl::init(0));
static cl::opt<bool>
DisableMMX("disable-mmx", cl::Hidden, cl::desc("Disable use of MMX"));
@@ -2271,6 +2272,8 @@
// Look for obvious safe cases to perform tail call optimization that does not
// requite ABI changes. This is what gcc calls sibcall.
+ if (NumTailCalls >= TailCallLimit)
+ return false;
// Do not tail call optimize vararg calls for now.
if (isVarArg)