Changes in directory llvm/lib/Target/SparcV8:
SparcV8ISelDAGToDAG.cpp updated: 1.34 -> 1.35
---
Log message:
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
---
Diffs of the changes: (+5 -2)
SparcV8ISelDAGToDAG.cpp | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
Index: llvm/lib/Target/SparcV8/SparcV8ISelDAGToDAG.cpp
diff -u llvm/lib/Target/SparcV8/SparcV8ISelDAGToDAG.cpp:1.34
llvm/lib/Target/SparcV8/SparcV8ISelDAGToDAG.cpp:1.35
--- llvm/lib/Target/SparcV8/SparcV8ISelDAGToDAG.cpp:1.34 Thu Dec 22
23:12:47 2005
+++ llvm/lib/Target/SparcV8/SparcV8ISelDAGToDAG.cpp Fri Dec 23 00:24:04 2005
@@ -568,8 +568,11 @@
LowerVAStart(SDOperand Chain, SDOperand VAListP, Value *VAListV,
SelectionDAG &DAG) {
- assert(0 && "Unimp");
- abort();
+ SDOperand Offset = DAG.getNode(ISD::ADD, MVT::i32,
+ DAG.getRegister(V8::I6, MVT::i32),
+ DAG.getConstant(VarArgsFrameOffset,
MVT::i32));
+ return DAG.getNode(ISD::STORE, MVT::Other, Chain, Offset,
+ VAListP, DAG.getSrcValue(VAListV));
}
std::pair<SDOperand,SDOperand> SparcV8TargetLowering::
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