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prog_optimize: Set unused regs to PROGRAM_UNDEFINED after CMP->MOV conversion

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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

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
(cherry picked from commit fbeb68e880)
This commit is contained in:
Ian Romanick 2011-07-20 18:02:17 -07:00
parent 8b41ae0b2a
commit a2b8802ed5
1 changed files with 9 additions and 0 deletions
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9
src/mesa/program/prog_optimize.c
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@ -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) {