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| author | Eli Friedman <eli.friedman@gmail.com> | 2008-05-19 23:27:48 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2008-05-19 23:27:48 +0000 |
| commit | d4b32e46517358f34e8cfbea35010adfcc3786e0 (patch) | |
| tree | 5ca08872d00fad81c462bdfd01ea538044b36f2d | |
| parent | e6b0ab41dff0774fc7af7b4205318eec66da94c0 (diff) | |
Implement CodeGen for __builtin_memcpy.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51282 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/CGBuiltin.cpp | 10 | ||||
| -rw-r--r-- | test/CodeGen/builtinmemcpy.c | 3 |
2 files changed, 13 insertions, 0 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp index d15780a63b..e29a174229 100644 --- a/lib/CodeGen/CGBuiltin.cpp +++ b/lib/CodeGen/CGBuiltin.cpp @@ -252,6 +252,16 @@ RValue CodeGenFunction::EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E) { return RValue::get(Builder.CreateAlloca(llvm::Type::Int8Ty, EmitScalarExpr(E->getArg(0)), "tmp")); + case Builtin::BI__builtin_memcpy: { + Value* MemCpyOps[4] = { + EmitScalarExpr(E->getArg(0)), + EmitScalarExpr(E->getArg(1)), + EmitScalarExpr(E->getArg(2)), + llvm::ConstantInt::get(llvm::Type::Int32Ty, 0) + }; + Builder.CreateCall(CGM.getMemCpyFn(), MemCpyOps, MemCpyOps+4); + return RValue::get(MemCpyOps[0]); + } case Builtin::BI__sync_fetch_and_add: return EmitBinaryAtomic(*this, Intrinsic::atomic_las, E); case Builtin::BI__sync_fetch_and_sub: diff --git a/test/CodeGen/builtinmemcpy.c b/test/CodeGen/builtinmemcpy.c new file mode 100644 index 0000000000..8600d98696 --- /dev/null +++ b/test/CodeGen/builtinmemcpy.c @@ -0,0 +1,3 @@ +// RUN: clang -emit-llvm < %s -o - | grep "llvm.memcpy" + +char* x(char* a, char* b) {return __builtin_memcpy(a, b, 4);} |