[PATCH] D63774: android: enable double-word CAS on x86_64

[Saleem Abdulrasool via Phabricator via cfe-commits]

compnerd updated this revision to Diff 206508.
compnerd added a comment.

add additional context and test case


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D63774/new/

https://reviews.llvm.org/D63774

Files:
  lib/Driver/ToolChains/Arch/X86.cpp
  test/Driver/android-default-x86_64.c


Index: test/Driver/android-default-x86_64.c
===================================================================
--- /dev/null
+++ test/Driver/android-default-x86_64.c
@@ -0,0 +1,2 @@
+// RUN: %clang -### -target x86_64-unknown-linux-android -c %s 2>&1 | FileCheck %s
+// CHECK: "-mcx16"
Index: lib/Driver/ToolChains/Arch/X86.cpp
===================================================================
--- lib/Driver/ToolChains/Arch/X86.cpp
+++ lib/Driver/ToolChains/Arch/X86.cpp
@@ -135,10 +135,11 @@
     if (ArchType == llvm::Triple::x86_64) {
       Features.push_back("+sse4.2");
       Features.push_back("+popcnt");
+      Features.push_back("+mcx16");
     } else
       Features.push_back("+ssse3");
   }

   // Translate the high level `-mretpoline` flag to the specific target feature
   // flags. We also detect if the user asked for retpoline external thunks but
   // failed to ask for retpolines themselves (through any of the different


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