From 7073ef96824242669735a8681519e1a0cee14309 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack@tungstengraphics.com>
Date: Thu, 25 Oct 2007 07:18:01 -0400
Subject: Implement else ops.

---
 src/mesa/pipe/llvm/instructions.cpp | 13 ++++++++++++-
 src/mesa/pipe/llvm/instructions.h   |  1 +
 src/mesa/pipe/llvm/llvmtgsi.cpp     |  6 +++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

(limited to 'src/mesa/pipe')

diff --git a/src/mesa/pipe/llvm/instructions.cpp b/src/mesa/pipe/llvm/instructions.cpp
index 622d420f64..a0645c5804 100644
--- a/src/mesa/pipe/llvm/instructions.cpp
+++ b/src/mesa/pipe/llvm/instructions.cpp
@@ -956,7 +956,7 @@ Function* makeLitFunction(Module *mod) {
 void Instructions::ifop(llvm::Value *in)
 {
    BasicBlock *ifthen = new BasicBlock(name("ifthen"), m_func,0);
-   BasicBlock *ifend = new BasicBlock(name("ifend"), m_func,0);
+   BasicBlock *ifend = new BasicBlock(name("ifthenend"), m_func,0);
 
    //BasicBlock *yblock = new BasicBlock(name("yblock"), m_func,0);
    //BasicBlock *zblock = new BasicBlock(name("zblock"), m_func,0);
@@ -981,6 +981,17 @@ llvm::BasicBlock * Instructions::currentBlock() const
    return m_block;
 }
 
+void Instructions::elseop()
+{
+   assert(!m_ifStack.empty());
+   BasicBlock *ifend = new BasicBlock(name("ifend"), m_func,0);
+   new BranchInst(ifend, m_block);
+   m_block = m_ifStack.top();
+   m_block->setName(name("ifelse"));
+   m_ifStack.pop();
+   m_ifStack.push(ifend);
+}
+
 void Instructions::endif()
 {
    assert(!m_ifStack.empty());
diff --git a/src/mesa/pipe/llvm/instructions.h b/src/mesa/pipe/llvm/instructions.h
index 8b47accd15..b0608e1da6 100644
--- a/src/mesa/pipe/llvm/instructions.h
+++ b/src/mesa/pipe/llvm/instructions.h
@@ -60,6 +60,7 @@ public:
    llvm::Value *dph(llvm::Value *in1, llvm::Value *in2);
    llvm::Value *dst(llvm::Value *in1, llvm::Value *in2);
    void         endif();
+   void         elseop();
    llvm::Value *ex2(llvm::Value *in);
    llvm::Value *floor(llvm::Value *in);
    llvm::Value *frc(llvm::Value *in);
diff --git a/src/mesa/pipe/llvm/llvmtgsi.cpp b/src/mesa/pipe/llvm/llvmtgsi.cpp
index 93dd2ea46a..6ff4bc2270 100644
--- a/src/mesa/pipe/llvm/llvmtgsi.cpp
+++ b/src/mesa/pipe/llvm/llvmtgsi.cpp
@@ -459,7 +459,11 @@ translate_instruction(llvm::Module *module,
       break;
    case TGSI_OPCODE_REP:
       break;
-   case TGSI_OPCODE_ELSE:
+   case TGSI_OPCODE_ELSE: {
+      instr->elseop();
+      storage->setCurrentBlock(instr->currentBlock());
+      return; //only state update
+   }
       break;
    case TGSI_OPCODE_ENDIF: {
       instr->endif();
-- 
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