[PATCH] D17874: Switch krait to use -mcpu=cortex-a15 for assembler tool invocations.

[Stephen Hines via cfe-commits]

srhines created this revision.
srhines added reviewers: cfe-commits, weimingz.
Herald added a subscriber: aemerson.

Using -no-integrated-as causes -mcpu=krait to be transformed into
-march=armv7-a today. This precludes the assembler from using
instructions like sdiv, which are present for krait. Cortex-a15 is the
closest subset of functionality for krait, so we should switch the
assembler to use that instead.

http://reviews.llvm.org/D17874

Files:
  lib/Driver/Tools.cpp

Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -8706,12 +8706,12 @@
     Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
 
     // FIXME: remove krait check when GNU tools support krait cpu
-    // for now replace it with -march=armv7-a  to avoid a lower
+    // for now replace it with -mcpu=cortex-a15 to avoid a lower
     // march from being picked in the absence of a cpu flag.
     Arg *A;
     if ((A = Args.getLastArg(options::OPT_mcpu_EQ)) &&
         StringRef(A->getValue()).lower() == "krait")
-      CmdArgs.push_back("-march=armv7-a");
+      CmdArgs.push_back("-mcpu=cortex-a15");
     else
       Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
     Args.AddLastArg(CmdArgs, options::OPT_mfpu_EQ);


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D17874.49791.patch
Type: text/x-patch
Size: 817 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20160304/55d9e793/attachment.bin>