diff options
| -rw-r--r-- | src/mesa/drivers/dri/r300/compiler/radeon_pair_regalloc.c | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_pair_regalloc.c b/src/mesa/drivers/dri/r300/compiler/radeon_pair_regalloc.c index 91524f5ec68..3f880c88fa7 100644 --- a/src/mesa/drivers/dri/r300/compiler/radeon_pair_regalloc.c +++ b/src/mesa/drivers/dri/r300/compiler/radeon_pair_regalloc.c @@ -66,10 +66,13 @@ struct regalloc_state { struct hardware_register * HwTemporary; unsigned int NumHwTemporaries; /** - * If an instruction is inside of a loop, end_loop will be the - * IP of the ENDLOOP instruction, otherwise end_loop will be 0 + * If an instruction is inside of a loop, EndLoop will be the + * IP of the ENDLOOP instruction, and BeginLoop will be the IP + * of the BGNLOOP instruction. Otherwise, EndLoop and BeginLoop + * will be -1. */ - int end_loop; + int EndLoop; + int BeginLoop; }; static void print_live_intervals(struct live_intervals * src) @@ -180,11 +183,13 @@ static void scan_callback(void * data, struct rc_instruction * inst, reg->Used = 1; if (file == RC_FILE_INPUT) reg->Live.Start = -1; + else if (s->BeginLoop >= 0) + reg->Live.Start = s->BeginLoop; else reg->Live.Start = inst->IP; reg->Live.End = inst->IP; - } else if (s->end_loop) - reg->Live.End = s->end_loop; + } else if (s->EndLoop >= 0) + reg->Live.End = s->EndLoop; else if (inst->IP > reg->Live.End) reg->Live.End = inst->IP; } @@ -195,6 +200,8 @@ static void compute_live_intervals(struct radeon_compiler *c, memset(s, 0, sizeof(*s)); s->C = c; s->NumHwTemporaries = c->max_temp_regs; + s->BeginLoop = -1; + s->EndLoop = -1; s->HwTemporary = memory_pool_malloc(&c->Pool, s->NumHwTemporaries * sizeof(struct hardware_register)); @@ -207,8 +214,10 @@ static void compute_live_intervals(struct radeon_compiler *c, inst = inst->Next) { /* For all instructions inside of a loop, the ENDLOOP - * instruction is used as the end of the live interval. */ - if (inst->U.I.Opcode == RC_OPCODE_BGNLOOP && !s->end_loop) { + * instruction is used as the end of the live interval and + * the BGNLOOP instruction is used as the beginning. */ + if (inst->U.I.Opcode == RC_OPCODE_BGNLOOP && s->EndLoop < 0) { + s->BeginLoop = inst->IP; int loops = 1; struct rc_instruction * tmp; for(tmp = inst->Next; @@ -219,15 +228,17 @@ static void compute_live_intervals(struct radeon_compiler *c, } else if (tmp->U.I.Opcode == RC_OPCODE_ENDLOOP) { if(!--loops) { - s->end_loop = tmp->IP; + s->EndLoop = tmp->IP; break; } } } } - if (inst->IP == s->end_loop) - s->end_loop = 0; + if (inst->IP == s->EndLoop) { + s->EndLoop = -1; + s->BeginLoop = -1; + } rc_for_all_reads_mask(inst, scan_callback, s); rc_for_all_writes_mask(inst, scan_callback, s); |