Fix a bug where -msse followed by -mno-sse would leave MMX enabled.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190496 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index aa0993d4aa78e99e4c76bcabb2a658791aff1a65..00431c2a0d6f5adbb58929a4edfd221feec9d3ef 100644 (file)
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -2143,8 +2143,6 @@ void X86TargetInfo::setSSELevel(llvm::StringMap<bool> &Features,
     case SSE2:
       Features["sse2"] = true;
     case SSE1:
-      if (!Features.count("mmx"))
-        setMMXLevel(Features, MMX, Enabled);
       Features["sse"] = true;
     case NoSSE:
       break;
@@ -2427,10 +2425,14 @@ bool X86TargetInfo::HandleTargetFeatures(std::vector<std::string> &Features,
 
   // Don't tell the backend if we're turning off mmx; it will end up disabling
   // SSE, which we don't want.
+  // Additionally, if SSE is enabled and mmx is not explicitly disabled,
+  // then enable MMX.
   std::vector<std::string>::iterator it;
   it = std::find(Features.begin(), Features.end(), "-mmx");
   if (it != Features.end())
     Features.erase(it);
+  else if (SSELevel > NoSSE)
+    MMX3DNowLevel = std::max(MMX3DNowLevel, MMX);
   return true;
 }
 

diff --git a/test/Preprocessor/x86_target_features.c b/test/Preprocessor/x86_target_features.c
index 48d5bcb65b974b0290a6fe13be1ee6a21441050f..517f5c6e83057a3a28f90597780bdc92a18afcf4 100644 (file)
--- a/test/Preprocessor/x86_target_features.c
+++ b/test/Preprocessor/x86_target_features.c
@@ -140,3 +140,15 @@
 // RUN: %clang -target i386-unknown-unknown -march=atom -mpopcnt -mno-sse4.2 -x c -E -dM -o - %s | FileCheck --check-prefix=NOSSE42POPCNT %s
 
 // NOSSE42POPCNT: #define __POPCNT__ 1
+
+// RUN: %clang -target i386-unknown-unknown -march=atom -msse -x c -E -dM -o - %s | FileCheck --check-prefix=SSEMMX %s
+
+// SSEMMX: #define __MMX__ 1
+
+// RUN: %clang -target i386-unknown-unknown -march=atom -msse -mno-sse -x c -E -dM -o - %s | FileCheck --check-prefix=SSENOSSEMMX %s
+
+// SSENOSSEMMX-NOT: #define __MMX__ 1
+
+// RUN: %clang -target i386-unknown-unknown -march=atom -msse -mno-mmx -x c -E -dM -o - %s | FileCheck --check-prefix=SSENOMMX %s
+
+// SSENOMMX-NOT: #define __MMX__ 1