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r300/compiler: In the peephole optimizer, ELSE should mark the end of a

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block.
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Tom Stellard 2010-06-14 22:30:02 -07:00 • committed by Marek Olšák
parent 29a1d6aee7
commit 1732751242
1 changed files with 13 additions and 2 deletions
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15
src/mesa/drivers/dri/r300/compiler/radeon_optimize.c
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@ -75,6 +75,15 @@ struct peephole_state {
int BranchDepth;
};
/**
* This is a callback function that is meant to be passed to
* rc_for_all_reads_mask. This function will be called once for each source
* register in inst.
* @param inst The instruction that the source register belongs to.
* @param file The register file of the source register.
* @param index The index of the source register.
* @param mask The components of the source register that are being read from.
*/
static void peephole_scan_read(void * data, struct rc_instruction * inst,
rc_register_file file, unsigned int index, unsigned int mask)
{
@ -161,7 +170,8 @@ static void peephole(struct radeon_compiler * c, struct rc_instruction * inst_mo
if (s.BranchDepth >= 0) {
if (inst->U.I.Opcode == RC_OPCODE_IF) {
s.BranchDepth++;
} else if (inst->U.I.Opcode == RC_OPCODE_ENDIF) {
} else if (inst->U.I.Opcode == RC_OPCODE_ENDIF
|| inst->U.I.Opcode == RC_OPCODE_ELSE) {
s.BranchDepth--;
if (s.BranchDepth < 0) {
s.DefinedMask &= ~s.MovMask;
@ -208,7 +218,8 @@ static void peephole(struct radeon_compiler * c, struct rc_instruction * inst_mo
if (s.BranchDepth >= 0) {
if (inst->U.I.Opcode == RC_OPCODE_IF) {
s.BranchDepth++;
} else if (inst->U.I.Opcode == RC_OPCODE_ENDIF) {
} else if (inst->U.I.Opcode == RC_OPCODE_ENDIF
|| inst->U.I.Opcode == RC_OPCODE_ELSE) {
s.BranchDepth--;
if (s.BranchDepth < 0)
break; /* no more readers after this point */