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| author | Daniel Dunbar <daniel@zuster.org> | 2008-07-22 00:26:45 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2008-07-22 00:26:45 +0000 |
| commit | 1caae959017b355e9bb61250d5a0d04edbf468b0 (patch) | |
| tree | 1b775158f195584252a56fef917267bb2c5749c2 /lib/CodeGen/CGBuiltin.cpp | |
| parent | 4493f79fce48cd9cbd9f55fa9d452cde736747a0 (diff) | |
Implement bzero, memset, memmove builtins.
This subsumes Nico Weber's patch and implements bzero in terms
of llvm.memset to match llvm-gcc.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53888 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/CGBuiltin.cpp')
| -rw-r--r-- | lib/CodeGen/CGBuiltin.cpp | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp index 87d09a981d..9de5a5acd4 100644 --- a/lib/CodeGen/CGBuiltin.cpp +++ b/lib/CodeGen/CGBuiltin.cpp @@ -291,18 +291,39 @@ RValue CodeGenFunction::EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E) { // FIXME: LLVM IR Should allow alloca with an i64 size! Value *Size = EmitScalarExpr(E->getArg(0)); Size = Builder.CreateIntCast(Size, llvm::Type::Int32Ty, false, "tmp"); - return RValue::get(Builder.CreateAlloca(llvm::Type::Int8Ty, Size, - "tmp")); + return RValue::get(Builder.CreateAlloca(llvm::Type::Int8Ty, Size, "tmp")); + } + case Builtin::BI__builtin_bzero: { + Value *Address = EmitScalarExpr(E->getArg(0)); + Builder.CreateCall4(CGM.getMemSetFn(), Address, + llvm::ConstantInt::get(llvm::Type::Int8Ty, 0), + EmitScalarExpr(E->getArg(1)), + llvm::ConstantInt::get(llvm::Type::Int32Ty, 1)); + return RValue::get(Address); } 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]); + Value *Address = EmitScalarExpr(E->getArg(0)); + Builder.CreateCall4(CGM.getMemCpyFn(), Address, + EmitScalarExpr(E->getArg(1)), + EmitScalarExpr(E->getArg(2)), + llvm::ConstantInt::get(llvm::Type::Int32Ty, 1)); + return RValue::get(Address); + } + case Builtin::BI__builtin_memmove: { + Value *Address = EmitScalarExpr(E->getArg(0)); + Builder.CreateCall4(CGM.getMemMoveFn(), Address, + EmitScalarExpr(E->getArg(1)), + EmitScalarExpr(E->getArg(2)), + llvm::ConstantInt::get(llvm::Type::Int32Ty, 1)); + return RValue::get(Address); + } + case Builtin::BI__builtin_memset: { + Value *Address = EmitScalarExpr(E->getArg(0)); + Builder.CreateCall4(CGM.getMemSetFn(), Address, + EmitScalarExpr(E->getArg(1)), + EmitScalarExpr(E->getArg(2)), + llvm::ConstantInt::get(llvm::Type::Int32Ty, 1)); + return RValue::get(Address); } case Builtin::BI__builtin_return_address: { Value *F = CGM.getIntrinsic(Intrinsic::returnaddress, 0, 0); |