From: Keith Whitwell <keithw@vmware.com>
Date: Thu, 7 Oct 2010 18:49:20 +0000 (+0100)
Subject: llvmpipe: store zero into all alloca'd values
X-Git-Tag: mesa-7.10~1151^2~230
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6da29f36111edc821a4aa10128e9681fc75a43d7;p=platform%2Fupstream%2Fmesa.git

llvmpipe: store zero into all alloca'd values

Fixes slowdown in isosurf with earlier versions of llvm.
---

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_flow.c b/src/gallium/auxiliary/gallivm/lp_bld_flow.c
index 5bc9c74..cd5fbc2 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);