From 5015b3417fcf5b415fa9a1e5b111ea6f8e96fbfa Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Sat, 7 Aug 2010 00:20:35 +0000
Subject: [PATCH] Don't attempt the PRE inline asm calls, since we don't value
 number them yet.  Fixes PR7835.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110489 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/GVN.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index 42afd6d5dbc..81cbc4e2127 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -2111,6 +2111,11 @@ bool GVN::performPRE(Function &F) {
           CurInst->mayReadFromMemory() || CurInst->mayHaveSideEffects() ||
           isa<DbgInfoIntrinsic>(CurInst))
         continue;
+      
+      // We don't currently value number ANY inline asm calls.
+      if (CallInst *CallI = dyn_cast<CallInst>(CurInst))
+        if (CallI->isInlineAsm())
+          continue;
 
       uint32_t ValNo = VN.lookup(CurInst);
 
-- 
2.34.1