r374822 - Add support to -Wa,-W in clang

[Jian Cai via cfe-commits]

Author: jcai19
Date: Mon Oct 14 14:21:39 2019
New Revision: 374822

URL: http://llvm.org/viewvc/llvm-project?rev=374822&view=rev
Log:
Add support to -Wa,-W in clang

Currently clang does not support -Wa,-W, which suppresses warning
messages in GNU assembler. Add this option for gcc compatibility.
https://bugs.llvm.org/show_bug.cgi?id=43651

Added:
    cfe/trunk/test/Driver/as-w-option.c
Modified:
    cfe/trunk/lib/Driver/ToolChains/Clang.cpp

Modified: cfe/trunk/lib/Driver/ToolChains/Clang.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Clang.cpp?rev=374822&r1=374821&r2=374822&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChains/Clang.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains/Clang.cpp Mon Oct 14 14:21:39 2019
@@ -2140,7 +2140,7 @@ static void CollectArgsForIntegratedAsse
         CmdArgs.push_back("-msave-temp-labels");
       } else if (Value == "--fatal-warnings") {
         CmdArgs.push_back("-massembler-fatal-warnings");
-      } else if (Value == "--no-warn") {
+      } else if (Value == "--no-warn" || Value == "-W") {
         CmdArgs.push_back("-massembler-no-warn");
       } else if (Value == "--noexecstack") {
         UseNoExecStack = true;

Added: cfe/trunk/test/Driver/as-w-option.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/as-w-option.c?rev=374822&view=auto
==============================================================================
--- cfe/trunk/test/Driver/as-w-option.c (added)
+++ cfe/trunk/test/Driver/as-w-option.c Mon Oct 14 14:21:39 2019
@@ -0,0 +1,14 @@
+// RUN: %clang -### %s -c -o tmp.o -fno-integrated-as -Wa,-W 2>&1 | FileCheck -check-prefix=CHECK-NOIAS %s
+// RUN: %clang -### %s -c -o tmp.o -integrated-as -Wa,-W 2>&1 | FileCheck -check-prefix=CHECK-IAS %s
+// RUN: %clang %s -c -o %t.o -integrated-as -Wa,-W 2>&1 | FileCheck -allow-empty --check-prefix=CHECK-AS-NOWARN %s
+// RUN: %clang %s -c -o %t.o -fno-integrated-as -Wa,-W 2>&1 | FileCheck -allow-empty --check-prefix=CHECK-AS-NOWARN %s
+// RUN: not %clang %s -c -o %t.o -integrated-as -Wa,--fatal-warnings 2>&1 | FileCheck --check-prefix=CHECK-AS-FATAL %s
+// RUN: not %clang %s -c -o %t.o -fno-integrated-as -Wa,--fatal-warnings 2>&1 | FileCheck --check-prefix=CHECK-AS-FATAL %s
+
+// CHECK-IAS: "-cc1" {{.*}} "-massembler-no-warn"
+// CHECK-NOIAS: "-W"
+// CHECK-AS-NOWARN-NOT: warning:
+// CHECK-AS-FATAL-NOT: warning:
+// CHECK-AS-FATAL: error
+
+__asm(".warning");