[X86] Make -march=i686 an alias of -march=pentiumpro
I think the only reason they are different is because we don't set tune_i686 for -march=i686 to match GCC. But GCC 4.9.0 seems to have changed this behavior and they do set it now. So I think they can aliases now.
Differential Revision: https://reviews.llvm.org/D39349
llvm-svn: 316712
diff --git a/clang/test/Preprocessor/predefined-arch-macros.c b/clang/test/Preprocessor/predefined-arch-macros.c
index 43dc469..2f3d9e3 100644
--- a/clang/test/Preprocessor/predefined-arch-macros.c
+++ b/clang/test/Preprocessor/predefined-arch-macros.c
@@ -156,6 +156,8 @@
// CHECK_I686_M32: #define __i686__ 1
// CHECK_I686_M32: #define __pentiumpro 1
// CHECK_I686_M32: #define __pentiumpro__ 1
+// CHECK_I686_M32: #define __tune_i686__ 1
+// CHECK_I686_M32: #define __tune_pentiumpro__ 1
// CHECK_I686_M32: #define i386 1
// RUN: not %clang -march=i686 -m64 -E -dM %s -o - 2>&1 \
// RUN: -target i386-unknown-linux \