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implement vastart. The dag isel compiles this:
void test3(va_list Y); void test2(int F, ...) { va_list X; va_start(X, F); test3(X); } into this: test2: save -104, %o6, %o6 st %i5, [%i6+88] st %i4, [%i6+84] st %i3, [%i6+80] st %i2, [%i6+76] st %i1, [%i6+72] add %i6, 72, %o0 st %o0, [%i6+-4] call test3 nop restore %g0, %g0, %g0 retl nop The simple isel emits: test2: save -96, %o6, %o6 st %i0, [%i6+68] st %i1, [%i6+72] st %i2, [%i6+76] st %i3, [%i6+80] st %i4, [%i6+84] st %i5, [%i6+88] or %g0, 1, %l0 or %g0, 4, %l1 umul %l0, %l1, %l0 add %l0, 7, %l0 and %l0, -8, %l0 sub %o6, %l0, %o6 add %o6, 96, %l0 add %i6, 72, %l1 st %l1, [%l0] ld [%l0], %o0 call test3 nop restore %g0, %g0, %g0 retl nop git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24985 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -568,8 +568,11 @@ SDOperand SparcV8TargetLowering::
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LowerVAStart(SDOperand Chain, SDOperand VAListP, Value *VAListV,
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SelectionDAG &DAG) {
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assert(0 && "Unimp");
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abort();
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SDOperand Offset = DAG.getNode(ISD::ADD, MVT::i32,
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DAG.getRegister(V8::I6, MVT::i32),
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DAG.getConstant(VarArgsFrameOffset, MVT::i32));
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return DAG.getNode(ISD::STORE, MVT::Other, Chain, Offset,
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VAListP, DAG.getSrcValue(VAListV));
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}
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std::pair<SDOperand,SDOperand> SparcV8TargetLowering::
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@ -568,8 +568,11 @@ SDOperand SparcV8TargetLowering::
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LowerVAStart(SDOperand Chain, SDOperand VAListP, Value *VAListV,
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SelectionDAG &DAG) {
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assert(0 && "Unimp");
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abort();
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SDOperand Offset = DAG.getNode(ISD::ADD, MVT::i32,
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DAG.getRegister(V8::I6, MVT::i32),
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DAG.getConstant(VarArgsFrameOffset, MVT::i32));
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return DAG.getNode(ISD::STORE, MVT::Other, Chain, Offset,
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VAListP, DAG.getSrcValue(VAListV));
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}
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std::pair<SDOperand,SDOperand> SparcV8TargetLowering::
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