[cfe-commits] r51282 - in /cfe/trunk: lib/CodeGen/CGBuiltin.cpp test/CodeGen/builtinmemcpy.c

[Eli Friedman]

Author: efriedma
Date: Mon May 19 18:27:48 2008
New Revision: 51282

URL: http://llvm.org/viewvc/llvm-project?rev=51282&view=rev
Log:
Implement CodeGen for __builtin_memcpy.


Added:
    cfe/trunk/test/CodeGen/builtinmemcpy.c
Modified:
    cfe/trunk/lib/CodeGen/CGBuiltin.cpp

Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=51282&r1=51281&r2=51282&view=diff

==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Mon May 19 18:27:48 2008
@@ -252,6 +252,16 @@
     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:

Added: cfe/trunk/test/CodeGen/builtinmemcpy.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtinmemcpy.c?rev=51282&view=auto

==============================================================================
--- cfe/trunk/test/CodeGen/builtinmemcpy.c (added)
+++ cfe/trunk/test/CodeGen/builtinmemcpy.c Mon May 19 18:27:48 2008
@@ -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);}