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Make visitAllocaInst() look more like its X86 counterpart. 

llvm-svn: 14229
This commit is contained in:
Brian Gaeke 2004-06-18 08:45:52 +00:00
parent fcc30aca1b
commit 694f7b78d9
1 changed files with 11 additions and 3 deletions
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14
llvm/lib/Target/SparcV8/InstSelectSimple.cpp
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@ -905,16 +905,24 @@ void V8ISel::visitAllocaInst(AllocaInst &I) {
unsigned TmpReg1 = makeAnotherReg (Type::UIntTy); unsigned TmpReg1 = makeAnotherReg (Type::UIntTy);
unsigned TmpReg2 = makeAnotherReg (Type::UIntTy); unsigned TmpReg2 = makeAnotherReg (Type::UIntTy);
unsigned StackAdjReg = makeAnotherReg (Type::UIntTy); unsigned StackAdjReg = makeAnotherReg (Type::UIntTy);
unsigned DestReg = getReg (I);
// StackAdjReg = (ArraySize * TySize) rounded up to nearest doubleword boundary // StackAdjReg = (ArraySize * TySize) rounded up to nearest doubleword boundary
BuildMI (BB, V8::UMULrr, 2, TmpReg1).addReg (ArraySizeReg).addReg (TySizeReg); BuildMI (BB, V8::UMULrr, 2, TmpReg1).addReg (ArraySizeReg).addReg (TySizeReg);
// Round up TmpReg1 to nearest doubleword boundary: // Round up TmpReg1 to nearest doubleword boundary:
BuildMI (BB, V8::ADDri, 2, TmpReg2).addReg (TmpReg1).addSImm (7); BuildMI (BB, V8::ADDri, 2, TmpReg2).addReg (TmpReg1).addSImm (7);
BuildMI (BB, V8::ANDri, 2, StackAdjReg).addReg (TmpReg2).addSImm (-8); BuildMI (BB, V8::ANDri, 2, StackAdjReg).addReg (TmpReg2).addSImm (-8);
// Adjust stack, push pointer past trap frame space, put result in DestReg
// Subtract size from stack pointer, thereby allocating some space.
BuildMI (BB, V8::SUBrr, 2, V8::SP).addReg (V8::SP).addReg (StackAdjReg); BuildMI (BB, V8::SUBrr, 2, V8::SP).addReg (V8::SP).addReg (StackAdjReg);
BuildMI (BB, V8::ADDri, 2, DestReg).addReg (V8::SP).addSImm (96);
// Put a pointer to the space into the result register, by copying
// the stack pointer.
BuildMI (BB, V8::ADDri, 2, getReg(I)).addReg (V8::SP).addSImm (96);
// Inform the Frame Information that we have just allocated a variable-sized
// object.
F->getFrameInfo()->CreateVariableSizedObject();
} }
/// LowerUnknownIntrinsicFunctionCalls - This performs a prepass over the /// LowerUnknownIntrinsicFunctionCalls - This performs a prepass over the