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prog_optimize: Only merge writes to temporary registers

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In one optimization pass, register files may have been messed therefore
merging instructions which use the same index in two different register
files.
This commit is contained in:
Benjamin Segovia 2010-08-16 20:40:09 -07:00 • committed by Ian Romanick
parent 608f749ec3
commit 5a38e70d59
1 changed files with 5 additions and 1 deletions
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6
src/mesa/program/prog_optimize.c
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@ -758,7 +758,11 @@ _mesa_remove_extra_moves(struct gl_program *prog)
nesting--; nesting--;
break; break;
case OPCODE_MOV: case OPCODE_MOV:
if (i > 0 && can_downward_mov_be_modifed(mov) && nesting == 0) { if (i > 0 &&
can_downward_mov_be_modifed(mov) &&
mov->SrcReg[0].File == PROGRAM_TEMPORARY &&
nesting == 0)
{
/* see if this MOV can be removed */ /* see if this MOV can be removed */
const GLuint id = mov->SrcReg[0].Index; const GLuint id = mov->SrcReg[0].Index;