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Fix SPARC backend call instruction so that arguments passed through registers

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are correctly marked as used instead of passing all possible argument registers
as used.  

llvm-svn: 123301
This commit is contained in:
Venkatraman Govindaraju 2011-01-12 03:18:21 +00:00
parent e288204194
commit 816f7dfed0
3 changed files with 37 additions and 11 deletions
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22
lib/Target/Sparc/SparcISelLowering.cpp
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@ -1,3 +1,4 @@
//===-- SparcISelLowering.cpp - Sparc DAG Lowering Implementation ---------===//
//
// The LLVM Compiler Infrastructure
@ -514,11 +515,22 @@ SparcTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee))
Callee = DAG.getTargetExternalSymbol(E->getSymbol(), MVT::i32);
std::vector<EVT> NodeTys;
NodeTys.push_back(MVT::Other); // Returns a chain
NodeTys.push_back(MVT::Glue); // Returns a flag for retval copy to use.
SDValue Ops[] = { Chain, Callee, InFlag };
Chain = DAG.getNode(SPISD::CALL, dl, NodeTys, Ops, InFlag.getNode() ? 3 : 2);
// Returns a chain & a flag for retval copy to use
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
SmallVector<SDValue, 8> Ops;
Ops.push_back(Chain);
Ops.push_back(Callee);
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
unsigned Reg = RegsToPass[i].first;
if (Reg >= SP::I0 && Reg <= SP::I7)
Reg = Reg-SP::I0+SP::O0;
Ops.push_back(DAG.getRegister(Reg, RegsToPass[i].second.getValueType()));
}
if (InFlag.getNode())
Ops.push_back(InFlag);
Chain = DAG.getNode(SPISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
InFlag = Chain.getValue(1);
Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(ArgsSize, true),

13
lib/Target/Sparc/SparcInstrInfo.td
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@ -119,9 +119,10 @@ def callseq_start : SDNode<"ISD::CALLSEQ_START", SDT_SPCallSeqStart,
def callseq_end : SDNode<"ISD::CALLSEQ_END", SDT_SPCallSeqEnd,
[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue]>;
def SDT_SPCall : SDTypeProfile<0, 1, [SDTCisVT<0, i32>]>;
def SDT_SPCall : SDTypeProfile<0, -1, [SDTCisVT<0, i32>]>;
def call : SDNode<"SPISD::CALL", SDT_SPCall,
[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue]>;
[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
SDNPVariadic]>;
def retflag : SDNode<"SPISD::RET_FLAG", SDTNone,
[SDNPHasChain, SDNPOptInGlue]>;
@ -517,11 +518,11 @@ let Uses = [FCC] in
// Section B.24 - Call and Link Instruction, p. 125
// This is the only Format 1 instruction
let Uses = [O0, O1, O2, O3, O4, O5],
let Uses = [O6],
hasDelaySlot = 1, isCall = 1,
Defs = [O0, O1, O2, O3, O4, O5, O7, G1, G2, G3, G4, G5, G6, G7,
D0, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15] in {
def CALL : InstSP<(outs), (ins calltarget:$dst),
def CALL : InstSP<(outs), (ins calltarget:$dst, variable_ops),
"call $dst", []> {
bits<30> disp;
let op = 1;
@ -530,11 +531,11 @@ let Uses = [O0, O1, O2, O3, O4, O5],
// indirect calls
def JMPLrr : F3_1<2, 0b111000,
(outs), (ins MEMrr:$ptr),
(outs), (ins MEMrr:$ptr, variable_ops),
"call $ptr",
[(call ADDRrr:$ptr)]>;
def JMPLri : F3_2<2, 0b111000,
(outs), (ins MEMri:$ptr),
(outs), (ins MEMri:$ptr, variable_ops),
"call $ptr",
[(call ADDRri:$ptr)]>;
}

13
test/CodeGen/SPARC/2011-01-11-Call.ll Normal file
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@ -0,0 +1,13 @@
; RUN: llc -march=sparc -O0 <%s
define void @test() nounwind {
entry:
%0 = tail call i32 (...)* @foo() nounwind
tail call void (...)* @bar() nounwind
ret void
}
declare i32 @foo(...)
declare void @bar(...)