From: Bob Wilson <bob.wilson@apple.com>
Date: Thu, 29 May 2014 19:43:02 +0000 (+0000)
Subject: Make the -mno-global-merge option work for arm64/aarch64. rdar://17024719
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a7e8472be21324151dd7cc75c595cd380548824d;p=clang

Make the -mno-global-merge option work for arm64/aarch64. rdar://17024719

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209836 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 19816f745d..b623e10d3b 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -897,6 +897,14 @@ void Clang::AddAArch64TargetArgs(const ArgList &Args,
     CmdArgs.push_back("-backend-option");
     CmdArgs.push_back("-aarch64-strict-align");
   }
+
+  // Setting -mno-global-merge disables the codegen global merge pass. Setting
+  // -mglobal-merge has no effect as the pass is enabled by default.
+  if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
+                               options::OPT_mno_global_merge)) {
+    if (A->getOption().matches(options::OPT_mno_global_merge))
+      CmdArgs.push_back("-mno-global-merge");
+  }
 }
 
 // Get CPU and ABI names. They are not independent
diff --git a/test/Driver/mno-global-merge.c b/test/Driver/mno-global-merge.c
index ec9f69e67c..a17848f04d 100644
--- a/test/Driver/mno-global-merge.c
+++ b/test/Driver/mno-global-merge.c
@@ -2,11 +2,19 @@
 // RUN:   -mno-global-merge -### -fsyntax-only %s 2> %t
 // RUN: FileCheck --check-prefix=CHECK-NGM < %t %s
 
+// RUN: %clang -target arm64-apple-ios7 \
+// RUN:   -mno-global-merge -### -fsyntax-only %s 2> %t
+// RUN: FileCheck --check-prefix=CHECK-NGM < %t %s
+
 // CHECK-NGM: "-mno-global-merge"
 
 // RUN: %clang -target armv7-apple-darwin10 \
 // RUN:   -mglobal-merge -### -fsyntax-only %s 2> %t
 // RUN: FileCheck --check-prefix=CHECK-GM < %t %s
 
+// RUN: %clang -target arm64-apple-ios7 \
+// RUN:   -mglobal-merge -### -fsyntax-only %s 2> %t
+// RUN: FileCheck --check-prefix=CHECK-GM < %t %s
+
 // CHECK-GM-NOT: "-mglobal-merge"