From: Brian Paul <brianp@vmware.com>
Date: Thu, 29 Jul 2010 18:18:48 +0000 (+0100)
Subject: gallivm: fix lp_build_sample_offset() crash when indexing a 1-D texture
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5f90e76c54bbf4456c977b3cbca450d7a570179e;p=mesa.git

gallivm: fix lp_build_sample_offset() crash when indexing a 1-D texture

If y==NULL and y_stride==NULL it means the texture is 1D.  Return
zero for out_i and the offset instead of garbage.
---

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
index 0fd014ab9b3..655c4fb901a 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c
@@ -179,6 +179,9 @@ lp_build_sample_offset(struct lp_build_context *bld,
       LLVMValueRef y_offset = lp_build_mul(bld, y, y_stride);
       offset = lp_build_add(bld, offset, y_offset);
    }
+   else {
+      *out_j = bld->zero;
+   }
 
    if (z && z_stride) {
       LLVMValueRef z_offset = lp_build_mul(bld, z, z_stride);