[PATCH] D38168: [mips] Accept but ignore -m(no-)branch-likely

[Simon Dardis via Phabricator via cfe-commits]

sdardis created this revision.
Herald added a subscriber: arichardson.

-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.


https://reviews.llvm.org/D38168

Files:
  include/clang/Driver/Options.td
  test/Driver/mips-features.c


Index: test/Driver/mips-features.c
===================================================================
--- test/Driver/mips-features.c
+++ test/Driver/mips-features.c
@@ -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'
Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -2047,6 +2047,10 @@
 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>;


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