From: Jeffrey Yasskin <jyasskin@google.com>
Date: Tue, 6 Oct 2009 21:45:26 +0000 (+0000)
Subject: r83391 was completely broken since Twines keep references to their inputs, and
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0b22873adc26711e44a6f2e06eb0e97a01787594;p=oota-llvm.git

r83391 was completely broken since Twines keep references to their inputs, and
some of the inputs were temporaries.  Here's a real fix for the miscompilation.
Thanks to sabre for pointing out the problem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83417 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index 804769d04e9..6f805da3329 100644
--- a/lib/Support/Triple.cpp
+++ b/lib/Support/Triple.cpp
@@ -9,6 +9,7 @@
 
 #include "llvm/ADT/Triple.h"
 
+#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/Twine.h"
 #include <cassert>
 #include <cstring>
@@ -390,10 +391,14 @@ void Triple::setOS(OSType Kind) {
 }
 
 void Triple::setArchName(const StringRef &Str) {
-  // Work around a miscompilation bug in gcc 4.0.3.
-  Twine a = getVendorName() + "-" + getOSAndEnvironmentName();
-  Twine b = Str + "-" + a;
-  setTriple(b);
+  // Work around a miscompilation bug for Twines in gcc 4.0.3.
+  SmallString<64> Triple;
+  Triple += Str;
+  Triple += "-";
+  Triple += getVendorName();
+  Triple += "-";
+  Triple += getOSAndEnvironmentName();
+  setTriple(Triple.str());
 }
 
 void Triple::setVendorName(const StringRef &Str) {