From 6da29f36111edc821a4aa10128e9681fc75a43d7 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keithw@vmware.com>
Date: Thu, 7 Oct 2010 19:49:20 +0100
Subject: llvmpipe: store zero into all alloca'd values

Fixes slowdown in isosurf with earlier versions of llvm.
---
 src/gallium/auxiliary/gallivm/lp_bld_flow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_flow.c b/src/gallium/auxiliary/gallivm/lp_bld_flow.c
index 5bc9c741a8..cd5fbc2463 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_flow.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_flow.c
@@ -830,6 +830,7 @@ lp_build_alloca(LLVMBuilderRef builder,
    }
 
    res = LLVMBuildAlloca(first_builder, type, name);
+   LLVMBuildStore(builder, LLVMConstNull(type), res);
 
    LLVMDisposeBuilder(first_builder);
 
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