r281610 - [mips][ias] Enable IAS by default for N64 on Debian mips64el.

[Simon Dardis via cfe-commits]

Author: sdardis
Date: Thu Sep 15 09:01:55 2016
New Revision: 281610

URL: http://llvm.org/viewvc/llvm-project?rev=281610&view=rev
Log:
[mips][ias] Enable IAS by default for N64 on Debian mips64el.

Unfortunately we can't enable it for all N64 because it is not yet possible to
distinguish N32 from N64 from the triple on other environments.

N64 has been confirmed to produce identical (within reason) objects to GAS
during stage 2 of compiler recursion on N64-abi Fedora. Unfortunately,
Fedora's triples do not distinguish N32 from N64 so I can't enable it by
default there. I'm currently repeating this testing for Debian mips64el but
it's very unlikely to produce a different result.

Patch by: Daniel Sanders

Reviewers: sdardis

Differential Review: https://reviews.llvm.org/D22679

Modified:
    cfe/trunk/lib/Driver/ToolChains.cpp

Modified: cfe/trunk/lib/Driver/ToolChains.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains.cpp?rev=281610&r1=281609&r2=281610&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChains.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains.cpp Thu Sep 15 09:01:55 2016
@@ -2778,6 +2778,13 @@ bool Generic_GCC::IsIntegratedAssemblerD
   case llvm::Triple::mips:
   case llvm::Triple::mipsel:
     return true;
+  case llvm::Triple::mips64:
+  case llvm::Triple::mips64el:
+    // Enabled for Debian mips64/mips64el only. Other targets are unable to
+    // distinguish N32 from N64.
+    if (getTriple().getEnvironment() == llvm::Triple::GNUABI64)
+      return true;
+    return false;
   default:
     return false;
   }