[clang-cl] Enable -march option

This change allows usage of -march when using the clang-cl driver. This is similar to MSVC's /arch; however -march can target precisely all supported CPUs, while /arch has a more restricted set.

Differential Revision: https://reviews.llvm.org/D51806

llvm-svn: 341847

diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 32038dc..e1c2844 100644 (file)
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -1931,7 +1931,7 @@ def mappletvsimulator_version_min_EQ : Joined<["-"], "mappletvsimulator-version-
 def mwatchos_version_min_EQ : Joined<["-"], "mwatchos-version-min=">, Group<m_Group>;
 def mwatchos_simulator_version_min_EQ : Joined<["-"], "mwatchos-simulator-version-min=">;
 def mwatchsimulator_version_min_EQ : Joined<["-"], "mwatchsimulator-version-min=">, Alias<mwatchos_simulator_version_min_EQ>;
-def march_EQ : Joined<["-"], "march=">, Group<m_Group>;
+def march_EQ : Joined<["-"], "march=">, Group<m_Group>, Flags<[CoreOption]>;
 def masm_EQ : Joined<["-"], "masm=">, Group<m_Group>, Flags<[DriverOption]>;
 def mcmodel_EQ : Joined<["-"], "mcmodel=">, Group<m_Group>;
 def mimplicit_it_EQ : Joined<["-"], "mimplicit-it=">, Group<m_Group>;

diff --git a/clang/test/Driver/cl-options.c b/clang/test/Driver/cl-options.c
index c251380..851da9f 100644 (file)
--- a/clang/test/Driver/cl-options.c
+++ b/clang/test/Driver/cl-options.c
@@ -610,6 +610,7 @@
 // RUN:     -flto \
 // RUN:     -fmerge-all-constants \
 // RUN:     -no-canonical-prefixes \
+// RUN:     -march=skylake \
 // RUN:     --version \
 // RUN:     -Werror /Zs -- %s 2>&1