Author: hfinkel
Date: Mon Aug 31 18:55:19 2015
New Revision: 246510
URL: http://llvm.org/viewvc/llvm-project?rev=246510&view=rev
Log:
[PowerPC] Support __builtin_ppc_get_timebase
GCC 4.8+ has a PowerPC-specific intrinsic, __builtin_ppc_get_timebase, to do
what Clang's __builtin_readcyclecounter does. For compatibility with code that
uses GCC's spelling (including glibc), support it as well.
Partially fixes PR23681.
Modified:
cfe/trunk/include/clang/Basic/BuiltinsPPC.def
cfe/trunk/lib/CodeGen/CGBuiltin.cpp
cfe/trunk/test/CodeGen/builtins-ppc.c
Modified: cfe/trunk/include/clang/Basic/BuiltinsPPC.def
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/BuiltinsPPC.def?rev=246510&r1=246509&r2=246510&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/BuiltinsPPC.def (original)
+++ cfe/trunk/include/clang/Basic/BuiltinsPPC.def Mon Aug 31 18:55:19 2015
@@ -17,6 +17,8 @@
// The format of this database matches clang/Basic/Builtins.def.
+BUILTIN(__builtin_ppc_get_timebase, "ULLi", "n")
+
// This is just a placeholder, the types and attributes are wrong.
BUILTIN(__builtin_altivec_vaddcuw, "V4UiV4UiV4Ui", "")
Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=246510&r1=246509&r2=246510&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Mon Aug 31 18:55:19 2015
@@ -6414,6 +6414,11 @@ Value *CodeGenFunction::EmitPPCBuiltinEx
switch (BuiltinID) {
default: return nullptr;
+ // __builtin_ppc_get_timebase is GCC 4.8+'s PowerPC-specific name for what we
+ // call __builtin_readcyclecounter.
+ case PPC::BI__builtin_ppc_get_timebase:
+ return Builder.CreateCall(CGM.getIntrinsic(Intrinsic::readcyclecounter));
+
// vec_ld, vec_lvsl, vec_lvsr
case PPC::BI__builtin_altivec_lvx:
case PPC::BI__builtin_altivec_lvxl:
Modified: cfe/trunk/test/CodeGen/builtins-ppc.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtins-ppc.c?rev=246510&r1=246509&r2=246510&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/builtins-ppc.c (original)
+++ cfe/trunk/test/CodeGen/builtins-ppc.c Mon Aug 31 18:55:19 2015
@@ -7,3 +7,10 @@ void test_eh_return_data_regno()
res = __builtin_eh_return_data_regno(0); // CHECK: store volatile i32 3
res = __builtin_eh_return_data_regno(1); // CHECK: store volatile i32 4
}
+
+// CHECK-LABEL: define i64 @test_builtin_ppc_get_timebase
+long long test_builtin_ppc_get_timebase() {
+ // CHECK: call i64 @llvm.readcyclecounter()
+ return __builtin_ppc_get_timebase();
+}
+
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
