From e43cfa1fdbf5b404a76e31f31b1505c7852a1967 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Fri, 29 Oct 2010 20:14:02 +0000
Subject: [PATCH] Switch to using the integrated assembler by default on x86
 and x86-64 ELF systems.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117697 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Driver/ToolChains.cpp |  8 ++++----
 lib/Driver/ToolChains.h   | 20 ++++++++++++++++----
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 9417a99786..126e3fd959 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1031,7 +1031,7 @@ Tool &TCEToolChain::SelectTool(const Compilation &C,
 /// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
 
 OpenBSD::OpenBSD(const HostInfo &Host, const llvm::Triple& Triple)
-  : Generic_GCC(Host, Triple) {
+  : Generic_ELF(Host, Triple) {
   getFilePaths().push_back(getDriver().Dir + "/../lib");
   getFilePaths().push_back("/usr/lib");
 }
@@ -1061,7 +1061,7 @@ Tool &OpenBSD::SelectTool(const Compilation &C, const JobAction &JA) const {
 /// FreeBSD - FreeBSD tool chain which can call as(1) and ld(1) directly.
 
 FreeBSD::FreeBSD(const HostInfo &Host, const llvm::Triple& Triple)
-  : Generic_GCC(Host, Triple) {
+  : Generic_ELF(Host, Triple) {
 
   // Determine if we are compiling 32-bit code on an x86_64 platform.
   bool Lib32 = false;
@@ -1178,7 +1178,7 @@ Tool &AuroraUX::SelectTool(const Compilation &C, const JobAction &JA) const {
 /// Linux toolchain (very bare-bones at the moment).
 
 Linux::Linux(const HostInfo &Host, const llvm::Triple& Triple)
-  : Generic_GCC(Host, Triple) {
+  : Generic_ELF(Host, Triple) {
   getFilePaths().push_back(getDriver().Dir +
                            "/../lib/clang/" CLANG_VERSION_STRING "/");
   getFilePaths().push_back("/lib/");
@@ -1224,7 +1224,7 @@ Tool &Linux::SelectTool(const Compilation &C, const JobAction &JA) const {
 /// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.
 
 DragonFly::DragonFly(const HostInfo &Host, const llvm::Triple& Triple)
-  : Generic_GCC(Host, Triple) {
+  : Generic_ELF(Host, Triple) {
 
   // Path mangling to find libexec
   getProgramPaths().push_back(getDriver().getInstalledDir());
diff --git a/lib/Driver/ToolChains.h b/lib/Driver/ToolChains.h
index 3993cd2d3e..b98f1769c6 100644
--- a/lib/Driver/ToolChains.h
+++ b/lib/Driver/ToolChains.h
@@ -266,6 +266,18 @@ public:
   virtual const char *GetDefaultRelocationModel() const { return "pic"; }
 };
 
+class LLVM_LIBRARY_VISIBILITY Generic_ELF : public Generic_GCC {
+ public:
+  Generic_ELF(const HostInfo &Host, const llvm::Triple& Triple)
+    : Generic_GCC(Host, Triple) {}
+
+  virtual bool IsIntegratedAssemblerDefault() const {
+    // Default integrated assembler to on for x86.
+    return (getTriple().getArch() == llvm::Triple::x86 ||
+            getTriple().getArch() == llvm::Triple::x86_64);
+  }
+};
+
 class LLVM_LIBRARY_VISIBILITY AuroraUX : public Generic_GCC {
 public:
   AuroraUX(const HostInfo &Host, const llvm::Triple& Triple);
@@ -273,14 +285,14 @@ public:
   virtual Tool &SelectTool(const Compilation &C, const JobAction &JA) const;
 };
 
-class LLVM_LIBRARY_VISIBILITY OpenBSD : public Generic_GCC {
+class LLVM_LIBRARY_VISIBILITY OpenBSD : public Generic_ELF {
 public:
   OpenBSD(const HostInfo &Host, const llvm::Triple& Triple);
 
   virtual Tool &SelectTool(const Compilation &C, const JobAction &JA) const;
 };
 
-class LLVM_LIBRARY_VISIBILITY FreeBSD : public Generic_GCC {
+class LLVM_LIBRARY_VISIBILITY FreeBSD : public Generic_ELF {
 public:
   FreeBSD(const HostInfo &Host, const llvm::Triple& Triple);
 
@@ -294,14 +306,14 @@ public:
   virtual Tool &SelectTool(const Compilation &C, const JobAction &JA) const;
 };
 
-class LLVM_LIBRARY_VISIBILITY DragonFly : public Generic_GCC {
+class LLVM_LIBRARY_VISIBILITY DragonFly : public Generic_ELF {
 public:
   DragonFly(const HostInfo &Host, const llvm::Triple& Triple);
 
   virtual Tool &SelectTool(const Compilation &C, const JobAction &JA) const;
 };
 
-class LLVM_LIBRARY_VISIBILITY Linux : public Generic_GCC {
+class LLVM_LIBRARY_VISIBILITY Linux : public Generic_ELF {
 public:
   Linux(const HostInfo &Host, const llvm::Triple& Triple);
 
-- 
2.40.0