From 789d248558061fe4d65f664d6770a12b90fa2e34 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack@tungstengraphics.com>
Date: Fri, 26 Oct 2007 19:12:02 -0400
Subject: Hold a stack of temporaries so that we can redeclare them for all
 defined functions. Fixes crashes in function calls.

---
 src/mesa/pipe/llvm/llvmtgsi.cpp |  4 +++-
 src/mesa/pipe/llvm/storage.cpp  | 21 +++++++++++++++++++++
 src/mesa/pipe/llvm/storage.h    |  3 +++
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/mesa/pipe/llvm/llvmtgsi.cpp b/src/mesa/pipe/llvm/llvmtgsi.cpp
index cfeb19e4ba8..af602326ae6 100644
--- a/src/mesa/pipe/llvm/llvmtgsi.cpp
+++ b/src/mesa/pipe/llvm/llvmtgsi.cpp
@@ -508,19 +508,21 @@ translate_instruction(llvm::Module *module,
    case TGSI_OPCODE_BGNSUB: {
       instr->bgnSub(instno, storage);
       storage->setCurrentBlock(instr->currentBlock());
+      storage->pushTemps();
       return;
    }
       break;
    case TGSI_OPCODE_ENDLOOP2: {
       instr->endLoop();
       storage->setCurrentBlock(instr->currentBlock());
-      storage->popArguments();
       return;
    }
       break;
    case TGSI_OPCODE_ENDSUB: {
       instr->endSub();
       storage->setCurrentBlock(instr->currentBlock());
+      storage->popArguments();
+      storage->popTemps();
       return;
    }
       break;
diff --git a/src/mesa/pipe/llvm/storage.cpp b/src/mesa/pipe/llvm/storage.cpp
index 88ef6711cfb..7300cdfef06 100644
--- a/src/mesa/pipe/llvm/storage.cpp
+++ b/src/mesa/pipe/llvm/storage.cpp
@@ -369,3 +369,24 @@ void Storage::popArguments()
    m_CONST = arg.cst;
    m_argStack.pop();
 }
+
+void Storage::pushTemps()
+{
+   m_tempStack.push(m_temps);
+   std::vector<llvm::Value*> oldTemps = m_temps;
+   m_temps = std::vector<llvm::Value*>(32);
+   int i = 0;
+   for (std::vector<llvm::Value*>::iterator itr = oldTemps.begin();
+        itr != oldTemps.end(); ++itr) {
+      if (*itr) {
+         declareTemp(i);
+      }
+      ++i;
+   }
+}
+
+void Storage::popTemps()
+{
+   m_temps = m_tempStack.top();
+   m_tempStack.pop();
+}
diff --git a/src/mesa/pipe/llvm/storage.h b/src/mesa/pipe/llvm/storage.h
index b8d6eb06049..eeadaa0506a 100644
--- a/src/mesa/pipe/llvm/storage.h
+++ b/src/mesa/pipe/llvm/storage.h
@@ -84,6 +84,8 @@ public:
    void pushArguments(llvm::Value *out, llvm::Value *in,
                       llvm::Value *constPtr);
    void popArguments();
+   void pushTemps();
+   void popTemps();
 
 private:
    llvm::Value *maskWrite(llvm::Value *src, int mask, llvm::Value *templ);
@@ -122,6 +124,7 @@ private:
       llvm::Value *cst;
    };
    std::stack<Args> m_argStack;
+   std::stack<std::vector<llvm::Value*> > m_tempStack;
 };
 
 #endif
-- 
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