[llvm] r305178 - Initialize SubArch in class Triple

[Kamil Rytarowski via llvm-commits]

Author: kamil
Date: Sun Jun 11 19:28:14 2017
New Revision: 305178

URL: http://llvm.org/viewvc/llvm-project?rev=305178&view=rev
Log:
Initialize SubArch in class Triple

Summary:
LLDB built with asan on NetBSD detected issues in the following code:

```
void ArchSpec::Clear() {
  m_triple = llvm::Triple();
  m_core = kCore_invalid;
  m_byte_order = eByteOrderInvalid;
  m_distribution_id.Clear();
  m_flags = 0;
}
```

  --- lldb/source/Core/ArchSpec.cpp

Runtime error messages:

/public/pkgsrc-tmp/wip/lldb-netbsd/work/.buildlink/include/llvm/ADT/Triple.h:44:7: runtime error: load of value 32639, which is not a valid value for type 'SubArchType'
/public/pkgsrc-tmp/wip/lldb-netbsd/work/.buildlink/include/llvm/ADT/Triple.h:44:7: runtime error: load of value 3200171710, which is not a valid value for type 'SubArchType'
/public/pkgsrc-tmp/wip/lldb-netbsd/work/.buildlink/include/llvm/ADT/Triple.h:44:7: runtime error: load of value 3200171710, which is not a valid value for type 'SubArchType'

Correct this issue with initialization of SubArch() in the class Triple constructor.

Sponsored by <The NetBSD Foundation>

Reviewers: chandlerc, zturner

Reviewed By: zturner

Subscribers: llvm-commits, zturner

Differential Revision: https://reviews.llvm.org/D33845

Modified:
    llvm/trunk/include/llvm/ADT/Triple.h

Modified: llvm/trunk/include/llvm/ADT/Triple.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/Triple.h?rev=305178&r1=305177&r2=305178&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/Triple.h (original)
+++ llvm/trunk/include/llvm/ADT/Triple.h Sun Jun 11 19:28:14 2017
@@ -239,7 +239,9 @@ public:
 
   /// Default constructor is the same as an empty string and leaves all
   /// triple fields unknown.
-  Triple() : Data(), Arch(), Vendor(), OS(), Environment(), ObjectFormat() {}
+  Triple()
+      : Data(), Arch(), SubArch(), Vendor(), OS(), Environment(),
+        ObjectFormat() {}
 
   explicit Triple(const Twine &Str);
   Triple(const Twine &ArchStr, const Twine &VendorStr, const Twine &OSStr);