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Don't add a default STACK_ALIGN (use the generic ABI alignment)

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Implement calls to functions with byval arguments on X86


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42192 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2007-09-21 15:50:22 +00:00
parent 66018ea1b2
commit a37ac9ff53
3 changed files with 7 additions and 8 deletions
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1
lib/Target/TargetData.cpp
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@ -182,7 +182,6 @@ void TargetData::init(const std::string &TargetDescription) {
setAlignment(VECTOR_ALIGN, 8, 8, 64); // v2i32
setAlignment(VECTOR_ALIGN, 16, 16, 128); // v16i8, v8i16, v4i32, ...
setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct, union, class, ...
setAlignment(STACK_ALIGN, 0, 8, 0); // objects on the stack
while (!temp.empty()) {
std::string token = getToken(temp, "-");

13
lib/Target/X86/X86ISelLowering.cpp
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@ -859,9 +859,9 @@ SDOperand X86TargetLowering::LowerCCCCallTo(SDOperand Op, SelectionDAG &DAG,
assert(VA.isMemLoc());
if (StackPtr.Val == 0)
StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(), getPointerTy());
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
MemOpChains.push_back(LowerMemOpCallTo(Op, DAG, StackPtr, VA, Chain,
Arg));
}
}
@ -1064,7 +1064,6 @@ X86TargetLowering::LowerMemOpCallTo(SDOperand Op, SelectionDAG &DAG,
unsigned Align = 1 << ((Flags & ISD::ParamFlags::ByValAlign) >>
ISD::ParamFlags::ByValAlignOffs);
assert (Align >= 8);
unsigned Size = (Flags & ISD::ParamFlags::ByValSize) >>
ISD::ParamFlags::ByValSizeOffs;
@ -1133,9 +1132,9 @@ SDOperand X86TargetLowering::LowerFastCCCallTo(SDOperand Op, SelectionDAG &DAG,
assert(VA.isMemLoc());
if (StackPtr.Val == 0)
StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(), getPointerTy());
PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
MemOpChains.push_back(LowerMemOpCallTo(Op, DAG, StackPtr, VA, Chain,
Arg));
}
}

1
test/CodeGen/X86/byval2.ll
View File

@ -1,4 +1,5 @@
; RUN: llvm-as < %s | llc -march=x86-64 | grep rep.movsl | count 2
; RUN: llvm-as < %s | llc -march=x86 | grep rep.movsl | count 2
%struct.s = type { i64, i64, i64 }