From: Craig Topper <craig.topper@intel.com>
Date: Fri, 21 Jun 2019 18:49:21 +0000 (+0000)
Subject: [X86] Add a debug print of the node in the default case for unhandled opcodes in... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b9123f85905631e22cac01f2a589ca097c42775a;p=llvm

[X86] Add a debug print of the node in the default case for unhandled opcodes in ReplaceNodeResults.

This should be unreachable, but bugs can make it reachable. This
adds a debug print so we can see the bad node in the output when
the llvm_unreachable triggers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364091 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index caa8c1d47a1..7dce3276663 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -27262,6 +27262,10 @@ void X86TargetLowering::ReplaceNodeResults(SDNode *N,
   SDLoc dl(N);
   switch (N->getOpcode()) {
   default:
+#ifndef NDEBUG
+    dbgs() << "ReplaceNodeResults: ";
+    N->dump(&DAG);
+#endif
     llvm_unreachable("Do not know how to custom type legalize this operation!");
   case ISD::CTPOP: {
     assert(N->getValueType(0) == MVT::i64 && "Unexpected VT!");