From ebff55ce381a134cb4cc688641e3dd7b7bf92c47 Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Mon, 16 Apr 2007 06:55:42 +0000
Subject: [PATCH] For PR1328: Use the new parameter on Function::getIntrinsicID
 to identify cases where a function is being called with an "llvm." name but
 it isn't actually an intrinsic. In such cases generate an error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36121 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AsmParser/llvmAsmParser.y | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/AsmParser/llvmAsmParser.y b/lib/AsmParser/llvmAsmParser.y
index 9aa81ea8dcc..88cc7d30dde 100644
--- a/lib/AsmParser/llvmAsmParser.y
+++ b/lib/AsmParser/llvmAsmParser.y
@@ -2821,6 +2821,14 @@ InstVal : ArithmeticOps Types ValueRef ',' ValueRef {
     Value *V = getVal(PFTy, $4);   // Get the function we're calling...
     CHECK_FOR_ERROR
 
+    // Check for call to invalid intrinsic to avoid crashing later.
+    if (Function *theF = dyn_cast<Function>(V)) {
+      if (theF->hasName() && 0 == strncmp(theF->getName().c_str(), "llvm.", 5)&&
+        !theF->getIntrinsicID(true))
+        GEN_ERROR("Call to invalid LLVM intrinsic function '" +
+                  theF->getName() + "'");
+    }
+
     // Check the arguments 
     ValueList Args;
     if ($6->empty()) {                                   // Has no arguments?