From 6cf4963cdc33f06031ebf86e0606afa4b79ccde5 Mon Sep 17 00:00:00 2001
From: Jeffrey Yasskin <jyasskin@google.com>
Date: Tue, 6 Oct 2009 17:25:50 +0000
Subject: [PATCH] Fix PR5112, a miscompilation on gcc-4.0.3.  Patch by Collin
 Winter!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83391 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/Triple.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index fc3b3f7e2f8..804769d04e9 100644
--- a/lib/Support/Triple.cpp
+++ b/lib/Support/Triple.cpp
@@ -390,7 +390,10 @@ void Triple::setOS(OSType Kind) {
 }
 
 void Triple::setArchName(const StringRef &Str) {
-  setTriple(Str + "-" + getVendorName() + "-" + getOSAndEnvironmentName());
+  // Work around a miscompilation bug in gcc 4.0.3.
+  Twine a = getVendorName() + "-" + getOSAndEnvironmentName();
+  Twine b = Str + "-" + a;
+  setTriple(b);
 }
 
 void Triple::setVendorName(const StringRef &Str) {