[hexagon] add a -mcabac flag

For v73 and later, clang users who wish to use the cabac instructions need
a way to add the 'cabac' target feature.

Reviewed By: kparzysz

Differential Revision: https://reviews.llvm.org/D142947

diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 9aef703..3dead3f 100644 (file)
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -4559,6 +4559,8 @@ def mnvs : Flag<["-"], "mnvs">, Group<m_hexagon_Features_Group>,
   Flags<[CC1Option]>, HelpText<"Enable generation of new-value stores">;
 def mno_nvs : Flag<["-"], "mno-nvs">, Group<m_hexagon_Features_Group>,
   Flags<[CC1Option]>, HelpText<"Disable generation of new-value stores">;
+def mcabac: Flag<["-"], "mcabac">, Group<m_hexagon_Features_Group>,
+  HelpText<"Enable CABAC instructions">;
 
 // SPARC feature flags
 def mfpu : Flag<["-"], "mfpu">, Group<m_sparc_Features_Group>;

diff --git a/clang/test/Driver/hexagon-toolchain-elf.c b/clang/test/Driver/hexagon-toolchain-elf.c
index 477bc8a..9454c33 100644 (file)
--- a/clang/test/Driver/hexagon-toolchain-elf.c
+++ b/clang/test/Driver/hexagon-toolchain-elf.c
@@ -582,6 +582,16 @@
 // CHECK371-NOT: "+reserved-r19"
 
 // -----------------------------------------------------------------------------
+// mcabac
+// -----------------------------------------------------------------------------
+// RUN: %clang -### -target hexagon-unknown-elf -mcabac %s 2>&1 \
+// RUN:        | FileCheck --check-prefix=CHECK372 %s
+// CHECK372: "-target-feature" "+cabac"
+// RUN: %clang -### -target hexagon-unknown-elf %s 2>&1 \
+// RUN:        | FileCheck --check-prefix=CHECK373 %s
+// CHECK373-NOT: "+cabac"
+
+// -----------------------------------------------------------------------------
 // Misc Defaults
 // -----------------------------------------------------------------------------
 // RUN: %clang -### -target hexagon-unknown-elf \