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r300/compiler: Fix bug in rc_find_free_temporary 

Find used temporaries even if they are only written to in dead code.
This fixes a bug in the NQSSADCE stage.

Signed-off-by: Nicolai Hähnle <nhaehnle@gmail.com>
This commit is contained in:
Nicolai Hähnle 2009-08-26 22:53:24 +02:00
parent e1d978775f
commit 2114acb044
1 changed files with 8 additions and 2 deletions
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10
src/mesa/drivers/dri/r300/compiler/radeon_program.c
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@ -79,13 +79,19 @@ GLint rc_find_free_temporary(struct radeon_compiler * c)
for (struct rc_instruction * rcinst = c->Program.Instructions.Next; rcinst != &c->Program.Instructions; rcinst = rcinst->Next) {
const struct prog_instruction *inst = &rcinst->I;
const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
const GLuint nsrc = _mesa_num_inst_src_regs(inst->Opcode);
const GLuint ndst = _mesa_num_inst_dst_regs(inst->Opcode);
GLuint k;
for (k = 0; k < n; k++) {
for (k = 0; k < nsrc; k++) {
if (inst->SrcReg[k].File == PROGRAM_TEMPORARY)
used[inst->SrcReg[k].Index] = GL_TRUE;
}
if (ndst) {
if (inst->DstReg.File == PROGRAM_TEMPORARY)
used[inst->DstReg.Index] = GL_TRUE;
}
}
for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {