Support -march/-mtune/-mcpu.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90547 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvmc/plugins/Base/Base.td.in b/tools/llvmc/plugins/Base/Base.td.in
index 125e95c..84eb770 100644
--- a/tools/llvmc/plugins/Base/Base.td.in
+++ b/tools/llvmc/plugins/Base/Base.td.in
@@ -44,6 +44,12 @@
     (help "Relocation model: dynamic-no-pic"), (hidden)),
  (parameter_option "linker",
     (help "Choose linker (possible values: gcc, g++)")),
+ (parameter_option "mtune",
+    (help "Target a specific CPU type"), (hidden)),
+ (parameter_option "march",
+    (help "A synonym for -mtune"), (hidden)),
+ (parameter_option "mcpu",
+    (help "A deprecated synonym for -mtune"), (hidden)),
  (parameter_option "MF",
     (help "Specify a file to write dependencies to"), (hidden)),
  (parameter_option "MT",
@@ -119,6 +125,9 @@
          (not_empty "I"), (forward "I"),
          (not_empty "F"), (forward "F"),
          (not_empty "D"), (forward "D"),
+         (not_empty "march"), (forward "march"),
+         (not_empty "mtune"), (forward "mtune"),
+         (not_empty "mcpu"), (forward "mcpu"),
          (switch_on "O1"), (forward "O1"),
          (switch_on "O2"), (forward "O2"),
          (switch_on "O3"), (forward "O3"),
@@ -179,6 +188,9 @@
           (switch_on "fPIC"), (append_cmd "-relocation-model=pic"),
           (switch_on "mdynamic-no-pic"),
                      (append_cmd "-relocation-model=dynamic-no-pic"),
+          (not_empty "march"), (forward "mcpu"),
+          (not_empty "mtune"), (forward "mcpu"),
+          (not_empty "mcpu"), (forward "mcpu"),
           (not_empty "Wllc,"), (unpack_values "Wllc,")))
 ]>;