From 3f7a5ffac7e78bca47fa58849f5666fb334b3ab1 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jos=C3=A9=20Fonseca?= Date: Fri, 18 May 2012 01:03:13 +0100 Subject: [PATCH] llvmpipe: Avoid adding floating point zero to flat inputs. Which could clobber integer inputs, if the addition is not optimized away (e.g., if optimizations are disabled for debugging purposes). --- src/gallium/drivers/llvmpipe/lp_bld_interp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/gallium/drivers/llvmpipe/lp_bld_interp.c b/src/gallium/drivers/llvmpipe/lp_bld_interp.c index 0608ab0a2a7..0d51ccb0349 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_interp.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_interp.c @@ -239,7 +239,10 @@ coeffs_init(struct lp_build_interp_soa_context *bld, * Compute the attrib values on the upper-left corner of each quad. */ - a = LLVMBuildFAdd(builder, a, dadq2, ""); + if (interp != LP_INTERP_CONSTANT && + interp != LP_INTERP_FACING) { + a = LLVMBuildFAdd(builder, a, dadq2, ""); + } #if PERSPECTIVE_DIVIDE_PER_QUAD /* -- 2.30.2