Lower dynamic stack allocation on mingw32 to separate instruction.

[oota-llvm.git] / lib / Target / X86 / X86ISelLowering.h

diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index ffaf1cfbdc99094ec1059b08820f1c5c8825f068..4c12fcc32fd3bdb2c917e92a57ed30881af3e18d 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -249,6 +249,9 @@ namespace llvm {
       // with control flow.
       VASTART_SAVE_XMM_REGS,
 
+      // MINGW_ALLOCA - MingW's __alloca call to do stack probing.
+      MINGW_ALLOCA,
+
       // ATOMADD64_DAG, ATOMSUB64_DAG, ATOMOR64_DAG, ATOMAND64_DAG, 
       // ATOMXOR64_DAG, ATOMNAND64_DAG, ATOMSWAP64_DAG - 
       // Atomic 64-bit binary operations.
@@ -259,6 +262,10 @@ namespace llvm {
       ATOMAND64_DAG,
       ATOMNAND64_DAG,
       ATOMSWAP64_DAG
+
+      // WARNING: Do not add anything in the end unless you want the node to
+      // have memop! In fact, starting from ATOMADD64_DAG all opcodes will be
+      // thought as target memory ops!
     };
   }
 
@@ -789,7 +796,11 @@ namespace llvm {
     MachineBasicBlock *EmitLoweredSelect(MachineInstr *I,
                                          MachineBasicBlock *BB,
                     DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
-    
+
+    MachineBasicBlock *EmitLoweredMingwAlloca(MachineInstr *MI,
+                                              MachineBasicBlock *BB,
+                    DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const;
+
     /// Emit nodes that will be selected as "test Op0,Op0", or something
     /// equivalent, for use with the given x86 condition code.
     SDValue EmitTest(SDValue Op0, unsigned X86CC, SelectionDAG &DAG);