[clang] a8ccb48 - [X86] Add 'fxsr' feature to -march=pentium2 to match X86.td and gcc.

[Craig Topper via cfe-commits]

Author: Craig Topper
Date: 2019-11-06T10:27:53-08:00
New Revision: a8ccb48f697d3fbe85c593248ff1053fdf522a6e

URL: https://github.com/llvm/llvm-project/commit/a8ccb48f697d3fbe85c593248ff1053fdf522a6e
DIFF: https://github.com/llvm/llvm-project/commit/a8ccb48f697d3fbe85c593248ff1053fdf522a6e.diff

LOG: [X86] Add 'fxsr' feature to -march=pentium2 to match X86.td and gcc.

Added: 
    

Modified: 
    clang/lib/Basic/Targets/X86.cpp
    clang/test/Preprocessor/predefined-arch-macros.c

Removed: 
    


################################################################################
diff  --git a/clang/lib/Basic/Targets/X86.cpp b/clang/lib/Basic/Targets/X86.cpp
index 9ccc6d7945e9..51f2006ddbdc 100644
--- a/clang/lib/Basic/Targets/X86.cpp
+++ b/clang/lib/Basic/Targets/X86.cpp
@@ -246,10 +246,11 @@ bool X86TargetInfo::initFeatureMap(
   case CK_Pentium3:
   case CK_C3_2:
     setFeatureEnabledImpl(Features, "sse", true);
+    LLVM_FALLTHROUGH;
+  case CK_Pentium2:
     setFeatureEnabledImpl(Features, "fxsr", true);
     LLVM_FALLTHROUGH;
   case CK_PentiumMMX:
-  case CK_Pentium2:
   case CK_K6:
   case CK_WinChipC6:
     setFeatureEnabledImpl(Features, "mmx", true);

diff  --git a/clang/test/Preprocessor/predefined-arch-macros.c b/clang/test/Preprocessor/predefined-arch-macros.c
index 95bea654fe22..ab36e98beb71 100644
--- a/clang/test/Preprocessor/predefined-arch-macros.c
+++ b/clang/test/Preprocessor/predefined-arch-macros.c
@@ -184,6 +184,7 @@
 // RUN: %clang -march=pentium2 -m32 -E -dM %s -o - 2>&1 \
 // RUN:     -target i386-unknown-linux \
 // RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_PENTIUM2_M32
+// CHECK_PENTIUM2_M32: #define __FXSR__ 1
 // CHECK_PENTIUM2_M32: #define __MMX__ 1
 // CHECK_PENTIUM2_M32: #define __i386 1
 // CHECK_PENTIUM2_M32: #define __i386__ 1