[llvm-commits] CVS: reopt/lib/LightWtProfiling/UnpackTraceFunction.cpp

[Brian Gaeke]

Changes in directory reopt/lib/LightWtProfiling:

UnpackTraceFunction.cpp updated: 1.111 -> 1.112
---
Log message:

Start saving extra space in UTF prolog for "spilled" excess args.  We still
need to keep track of where each excess arg goes, though... soon to come.


---
Diffs of the changes:  (+11 -6)

Index: reopt/lib/LightWtProfiling/UnpackTraceFunction.cpp
diff -u reopt/lib/LightWtProfiling/UnpackTraceFunction.cpp:1.111 reopt/lib/LightWtProfiling/UnpackTraceFunction.cpp:1.112
--- reopt/lib/LightWtProfiling/UnpackTraceFunction.cpp:1.111	Thu Sep  2 11:55:44 2004
+++ reopt/lib/LightWtProfiling/UnpackTraceFunction.cpp	Thu Oct 14 14:50:53 2004
@@ -702,14 +702,19 @@
 
   // Calculate the stack size.
   // The actual amount we will allocate is (Static Stack Frame Size + Slop +
-  // Space for Regs).  The Slop = 176 number is from looking at the SparcV9
-  // ABI. The Space for Regs = 104 number is the number of 64-bit registers
-  // that are known to the SparcV9 backend.
+  // Space for Regs + Space for Spilled Args).  The Slop = 176 number is from
+  // looking at the SparcV9 ABI. The Space for Regs = 104 number is the number
+  // of 64-bit registers that are known to the SparcV9 backend. The Space for
+  // Spilled Args number is used to make stack space available to hold live-in
+  // values which would have been allocated to incoming-argument slots in the
+  // caller's stack frame, had we been directly executing the TraceToFunction
+  // output.
   StaticStackSize = getStaticStackSize (MF);
-  TotalStackSize = (StaticStackSize + 176 + 104 * 8);
+  int SpilledArgsSpace = std::max ((int)TF->TraceFn->asize() - 6, 0) * 8;
+  TotalStackSize = (StaticStackSize + 176 + 104 * 8 + SpilledArgsSpace);
   DEBUG(std::cerr << "UnpackTraceFunction: Stack sizes: static = "
-        << StaticStackSize << ", total = " << TotalStackSize << "\n");
-
+        << StaticStackSize << ", spilled args = " << SpilledArgsSpace
+        << ", total = " << TotalStackSize << "\n");
 
   bool Changed = false;
   for (MachineFunction::iterator I = MF.begin (), E = MF.end (); I != E; ++I)