r314213 - [mips] Accept but ignore -m(no-)branch-likely

[Simon Dardis via cfe-commits]

Author: sdardis
Date: Tue Sep 26 08:01:21 2017
New Revision: 314213

URL: http://llvm.org/viewvc/llvm-project?rev=314213&view=rev
Log:
[mips] Accept but ignore -m(no-)branch-likely

-mbranch-likely and -mno-branch-likely are used in some build systems for
some MIPS targets. Accept these options but ignore them as they are an
(de)optimiztion hint, and that branch likely instructions were deprecated
but not removed from MIPS32 and MIPS64 ISAs.

Reviewers: atanasyan, nitesh.jain

Differential Revision: https://reviews.llvm.org/D38168

Modified:
    cfe/trunk/include/clang/Driver/Options.td
    cfe/trunk/test/Driver/mips-features.c

Modified: cfe/trunk/include/clang/Driver/Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=314213&r1=314212&r2=314213&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Tue Sep 26 08:01:21 2017
@@ -2047,6 +2047,10 @@ def mcheck_zero_division : Flag<["-"], "
 def mno_check_zero_division : Flag<["-"], "mno-check-zero-division">,
                               Group<m_Group>;
 def mcompact_branches_EQ : Joined<["-"], "mcompact-branches=">, Group<m_Group>;
+def mbranch_likely : Flag<["-"], "mbranch-likely">, Group<m_Group>,
+  IgnoredGCCCompat;
+def mno_branch_likely : Flag<["-"], "mno-branch-likely">, Group<m_Group>,
+  IgnoredGCCCompat;
 def mdsp : Flag<["-"], "mdsp">, Group<m_Group>;
 def mno_dsp : Flag<["-"], "mno-dsp">, Group<m_Group>;
 def mdspr2 : Flag<["-"], "mdspr2">, Group<m_Group>;

Modified: cfe/trunk/test/Driver/mips-features.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/mips-features.c?rev=314213&r1=314212&r2=314213&view=diff
==============================================================================
--- cfe/trunk/test/Driver/mips-features.c (original)
+++ cfe/trunk/test/Driver/mips-features.c Tue Sep 26 08:01:21 2017
@@ -392,3 +392,13 @@
 // LONG-CALLS-ON: "-target-feature" "+long-calls"
 // LONG-CALLS-OFF: "-target-feature" "-long-calls"
 // LONG-CALLS-DEF-NOT: "long-calls"
+//
+// -mbranch-likely
+// RUN: %clang -target -mips-mti-linux-gnu -### -c %s -mbranch-likely 2>&1 \
+// RUN:   | FileCheck --check-prefix=BRANCH-LIKELY %s
+// BRANCH-LIKELY: argument unused during compilation: '-mbranch-likely'
+//
+// -mno-branch-likely
+// RUN: %clang -target -mips-mti-linux-gnu -### -c %s -mno-branch-likely 2>&1 \
+// RUN:   | FileCheck --check-prefix=NO-BRANCH-LIKELY %s
+// NO-BRANCH-LIKELY: argument unused during compilation: '-mno-branch-likely'