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llvmpipe: Avoid adding floating point zero to flat inputs.

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Which could clobber integer inputs, if the addition is not optimized away
(e.g., if optimizations are disabled for debugging purposes).
This commit is contained in:
José Fonseca 2012-05-18 01:03:13 +01:00
parent 00eb74b275
commit 3f7a5ffac7
1 changed files with 4 additions and 1 deletions
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5
src/gallium/drivers/llvmpipe/lp_bld_interp.c
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@ -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
/*