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Initial support for inline asm memory operand constraints. 

llvm-svn: 132768
This commit is contained in:
Akira Hatanaka 2011-06-09 03:31:05 +00:00
parent c62894d440
commit 0683a7212e
3 changed files with 51 additions and 0 deletions
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16
llvm/lib/Target/Mips/MipsAsmPrinter.cpp
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@ -56,6 +56,9 @@ namespace {
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O);
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O);
void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
void printUnsignedImm(const MachineInstr *MI, int opNum, raw_ostream &O);
void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
@ -304,6 +307,19 @@ bool MipsAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
return false;
}
bool MipsAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNum, unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &O) {
if (ExtraCode && ExtraCode[0])
return true; // Unknown modifier.
const MachineOperand &MO = MI->getOperand(OpNum);
assert(MO.isReg() && "unexpected inline asm memory operand");
O << "0($" << MipsAsmPrinter::getRegisterName(MO.getReg()) << ")";
return false;
}
void MipsAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(opNum);

12
llvm/lib/Target/Mips/MipsISelDAGToDAG.cpp
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@ -94,6 +94,10 @@ private:
inline SDValue getI32Imm(unsigned Imm) {
return CurDAG->getTargetConstant(Imm, MVT::i32);
}
virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
char ConstraintCode,
std::vector<SDValue> &OutOps);
};
}
@ -462,6 +466,14 @@ SDNode* MipsDAGToDAGISel::Select(SDNode *Node) {
return ResNode;
}
bool MipsDAGToDAGISel::
SelectInlineAsmMemoryOperand(const SDValue &Op, char ConstraintCode,
std::vector<SDValue> &OutOps) {
assert(ConstraintCode == 'm' && "unexpected asm memory constraint");
OutOps.push_back(Op);
return false;
}
/// createMipsISelDag - This pass converts a legalized DAG into a
/// MIPS-specific DAG, ready for instruction scheduling.
FunctionPass *llvm::createMipsISelDag(MipsTargetMachine &TM) {

23
llvm/test/CodeGen/Mips/inlineasmmemop.ll Normal file
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@ -0,0 +1,23 @@
; RUN: llc -march=mipsel -mcpu=4ke < %s | FileCheck %s
@g1 = external global i32
define i32 @f1(i32 %x) nounwind {
entry:
; CHECK: addiu $[[T0:[0-9]+]], $sp
; CHECK: #APP
; CHECK: sw $4, 0($[[T0]])
; CHECK: #NO_APP
; CHECK: lw $[[T1:[0-9]+]], %got(g1)($gp)
; CHECK: #APP
; CHECK: lw $[[T3:[0-9]+]], 0($[[T0]])
; CHECK: #NO_APP
; CHECK: sw $[[T3]], 0($[[T1]])
%l1 = alloca i32, align 4
call void asm "sw $1, $0", "=*m,r"(i32* %l1, i32 %x) nounwind
%0 = call i32 asm "lw $0, $1", "=r,*m"(i32* %l1) nounwind
store i32 %0, i32* @g1, align 4
ret i32 %0
}