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

diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index fc3b3f7e2f8d4cc99cdd944ce83856021dac627f..804769d04e978f33f65ed5c5051c8ef6474e3907 100644 (file)
--- 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) {