[PATCH] Add support for __GCC_HAVE_SYNC_COMPARE_AND_SWAP_{1, 2, 4, 8} on x86.
Michael Spencer
bigcheesegs at gmail.com
Wed Apr 3 17:36:26 PDT 2013
Hi doug.gregor,
This fixes std::thread with libstdc++.
http://llvm-reviews.chandlerc.com/D621
Files:
lib/Basic/Targets.cpp
test/Preprocessor/predefined-macros.c
Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -2730,6 +2730,14 @@
case NoMMX3DNow:
break;
}
+
+ if (CPU >= CK_i486) {
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
+ }
+ if (CPU >= CK_i586)
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
}
bool X86TargetInfo::hasFeature(StringRef Feature) const {
Index: test/Preprocessor/predefined-macros.c
===================================================================
--- test/Preprocessor/predefined-macros.c
+++ test/Preprocessor/predefined-macros.c
@@ -26,3 +26,21 @@
// RUN: %clang_cc1 %s -E -dM -o - \
// RUN: | FileCheck %s --check-prefix=CHECK-FINITE-MATH-FLAG-UNDEFINED
// CHECK-FINITE-MATH-FLAG-UNDEFINED: #define __FINITE_MATH_ONLY__ 0
+//
+// RUN: %clang_cc1 %s -E -dM -o - -triple i686 -target-cpu i386 \
+// RUN: | FileCheck %s --check-prefix=CHECK-SYNC_CAS_I386
+// CHECK-SYNC_CAS_I386-NOT: __GCC_HAVE_SYNC_COMPARE_AND_SWAP
+//
+// RUN: %clang_cc1 %s -E -dM -o - -triple i686 -target-cpu i486 \
+// RUN: | FileCheck %s --check-prefix=CHECK-SYNC_CAS_I486
+// CHECK-SYNC_CAS_I486: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1
+// CHECK-SYNC_CAS_I486: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
+// CHECK-SYNC_CAS_I486: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
+// CHECK-SYNC_CAS_I486-NOT: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
+//
+// RUN: %clang_cc1 %s -E -dM -o - -triple i686 -target-cpu i586 \
+// RUN: | FileCheck %s --check-prefix=CHECK-SYNC_CAS_I586
+// CHECK-SYNC_CAS_I586: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1
+// CHECK-SYNC_CAS_I586: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
+// CHECK-SYNC_CAS_I586: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
+// CHECK-SYNC_CAS_I586: __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
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