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authorAnton Korobeynikov <asl@math.spbu.ru>2008-06-11 20:16:42 +0000
committerAnton Korobeynikov <asl@math.spbu.ru>2008-06-11 20:16:42 +0000
commit487aefdd3956176b046acdef8a8b9e2795285257 (patch)
treea32e8adba58f4c801dd17faae4f0e066eb20736b /lib
parentd2aa7d11db1e985c13e3edb128cd9d3d09cd7b25 (diff)
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Properly lower DYNAMIC_STACKALLOC - bracket all black magic with
CALLSEQ_BEGIN & CALLSEQ_END. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52225 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r--lib/Target/X86/X86ISelLowering.cpp16
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 7421e3e..53f42b9 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -4803,17 +4803,19 @@ X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDOperand Op,
SelectionDAG &DAG) {
assert(Subtarget->isTargetCygMing() &&
"This should be used only on Cygwin/Mingw targets");
-
+
// Get the inputs.
SDOperand Chain = Op.getOperand(0);
SDOperand Size = Op.getOperand(1);
// FIXME: Ensure alignment here
SDOperand Flag;
-
+
MVT IntPtr = getPointerTy();
MVT SPTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
+ Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(0));
+
Chain = DAG.getCopyToReg(Chain, X86::EAX, Size, Flag);
Flag = Chain.getValue(1);
@@ -4821,12 +4823,18 @@ X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDOperand Op,
SDOperand Ops[] = { Chain,
DAG.getTargetExternalSymbol("_alloca", IntPtr),
DAG.getRegister(X86::EAX, IntPtr),
+ DAG.getRegister(X86StackPtr, SPTy),
Flag };
- Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops, 4);
+ Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops, 5);
Flag = Chain.getValue(1);
+ Chain = DAG.getCALLSEQ_END(Chain,
+ DAG.getIntPtrConstant(0),
+ DAG.getIntPtrConstant(0),
+ Flag);
+
Chain = DAG.getCopyFromReg(Chain, X86StackPtr, SPTy).getValue(1);
-
+
std::vector<MVT> Tys;
Tys.push_back(SPTy);
Tys.push_back(MVT::Other);