From: Ian Romanick <ian.d.roman...@intel.com>
Leaving the unused registers with other values caused assertion
failures and other problems in places that blindly iterate over all
sources.
brw_vs_emit.c:1381: get_src_reg: Assertion `c->regs[file][index].nr !=
0' failed.
Fixes i965 piglit:
vs-uniform-array-mat[234]-col-row-rd
vs-uniform-array-mat[234]-index-col-row-rd
vs-uniform-array-mat[234]-index-row-rd
vs-uniform-mat[234]-col-row-rd
---
src/mesa/program/prog_optimize.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/src/mesa/program/prog_optimize.c b/src/mesa/program/prog_optimize.c
index 8a40fa6..f4a7a63 100644
--- a/src/mesa/program/prog_optimize.c
+++ b/src/mesa/program/prog_optimize.c
@@ -1319,6 +1319,15 @@ _mesa_simplify_cmp(struct gl_program * program)
inst->Opcode = OPCODE_MOV;
inst->SrcReg[0] = inst->SrcReg[1];
+
+ /* Unused operands are expected to have the file set to
+ * PROGRAM_UNDEFINED. This is how _mesa_init_instructions initializes
+ * all of the sources.
+ */
+ inst->SrcReg[1].File = PROGRAM_UNDEFINED;
+ inst->SrcReg[1].Swizzle = SWIZZLE_NOOP;
+ inst->SrcReg[2].File = PROGRAM_UNDEFINED;
+ inst->SrcReg[2].Swizzle = SWIZZLE_NOOP;
}
}
if (dbg) {
--
1.7.4.4
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