Check if function names start with "llvm." before trying to lookup them up as
intrinsics. The intrinsic lookup code assumes that this check has been done
and assumes the names are at least 6 characters long. Valgrind complained
about this. pr6638.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98831 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/MBlaze/MBlazeIntrinsicInfo.cpp b/lib/Target/MBlaze/MBlazeIntrinsicInfo.cpp
index c8faffc..4931860 100644
--- a/lib/Target/MBlaze/MBlazeIntrinsicInfo.cpp
+++ b/lib/Target/MBlaze/MBlazeIntrinsicInfo.cpp
@@ -57,6 +57,10 @@
unsigned MBlazeIntrinsicInfo::
lookupName(const char *Name, unsigned Len) const {
+ if (Len < 5 || Name[4] != '.' || Name[0] != 'l' || Name[1] != 'l'
+ || Name[2] != 'v' || Name[3] != 'm')
+ return 0; // All intrinsics start with 'llvm.'
+
#define GET_FUNCTION_RECOGNIZER
#include "MBlazeGenIntrinsics.inc"
#undef GET_FUNCTION_RECOGNIZER