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r300/compiler: Use zero as the register index for unused sources

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This fixes an invalid "Too many hardware temporaries used" error in the
case where a source reads from a temporary register with an index greater
than max_temp_regs and then the source is marked as unused before the
register allocation pass.

NOTE: This is a candidate for the 7.9 branch.
(cherry picked from commit d668659003)
This commit is contained in:
Tom Stellard 2010-11-11 01:01:13 -08:00
parent 7c8715ef0a
commit 80ff25b628
2 changed files with 6 additions and 0 deletions
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3
src/mesa/drivers/dri/r300/compiler/r300_fragprog_emit.c
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@ -76,6 +76,9 @@ static void use_temporary(struct r300_fragment_program_code *code, unsigned int
static unsigned int use_source(struct r300_fragment_program_code* code, struct radeon_pair_instruction_source src)
{
if (!src.Used)
return 0;
if (src.File == RC_FILE_CONSTANT) {
return src.Index | (1 << 5);
} else if (src.File == RC_FILE_TEMPORARY) {

3
src/mesa/drivers/dri/r300/compiler/r500_fragprog_emit.c
View file

@ -200,6 +200,9 @@ static void use_temporary(struct r500_fragment_program_code* code, unsigned int
static unsigned int use_source(struct r500_fragment_program_code* code, struct radeon_pair_instruction_source src)
{
if (!src.Used)
return 0;
if (src.File == RC_FILE_CONSTANT) {
return src.Index | 0x100;
} else if (src.File == RC_FILE_TEMPORARY) {