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LowerCall() should always do getCopyFromReg() to reference the stack pointer.
Machine instruction selection is much happier when operands are in virtual registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97012 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -924,7 +924,7 @@ ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
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// These operations are automatically eliminated by the prolog/epilog pass
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Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
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SDValue StackPtr = DAG.getRegister(ARM::SP, MVT::i32);
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SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
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RegsToPassVector RegsToPass;
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SmallVector<SDValue, 8> MemOpChains;
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@ -973,8 +973,6 @@ ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
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VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
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} else {
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assert(VA.isMemLoc());
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if (StackPtr.getNode() == 0)
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StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
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MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
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dl, DAG, VA, Flags));
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@ -987,8 +985,6 @@ ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
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RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
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} else {
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assert(VA.isMemLoc());
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if (StackPtr.getNode() == 0)
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StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
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MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
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dl, DAG, VA, Flags));
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@ -52,7 +52,7 @@ bb420: ; preds = %bb20, %bb20
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; CHECK: str r{{[0-7]}}, [sp]
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; CHECK: str r{{[0-7]}}, [sp, #+4]
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; CHECK: str r{{[0-7]}}, [sp, #+8]
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; CHECK: str r{{[0-7]}}, [sp, #+24]
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; CHECK: str{{(.w)?}} r{{[0-9]+}}, [sp, #+24]
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store %union.rec* null, %union.rec** @zz_hold, align 4
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store %union.rec* null, %union.rec** @zz_res, align 4
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store %union.rec* %x, %union.rec** @zz_hold, align 4
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