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Set ir_ctx.prev_ref[] elements for inner BB traversing

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This commit is contained in:
Dmitry Stogov 2022-11-23 16:16:08 +03:00
parent b94f907907
commit bdb8e6a1da
2 changed files with 3 additions and 2 deletions
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2
ir_emit.c
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@ -270,11 +270,11 @@ int ir_match(ir_ctx *ctx)
if (!ctx->prev_ref) { if (!ctx->prev_ref) {
ctx->prev_ref = ir_mem_malloc(ctx->insns_count * sizeof(ir_ref)); ctx->prev_ref = ir_mem_malloc(ctx->insns_count * sizeof(ir_ref));
prev = 0;
for (b = 1, bb = ctx->cfg_blocks + b; b <= ctx->cfg_blocks_count; b++, bb++) { for (b = 1, bb = ctx->cfg_blocks + b; b <= ctx->cfg_blocks_count; b++, bb++) {
if (bb->flags & IR_BB_UNREACHABLE) { if (bb->flags & IR_BB_UNREACHABLE) {
continue; continue;
} }
prev = 0;
for (i = bb->start, insn = ctx->ir_base + i; i < bb->end;) { for (i = bb->start, insn = ctx->ir_base + i; i < bb->end;) {
ctx->prev_ref[i] = prev; ctx->prev_ref[i] = prev;
n = ir_operands_count(ctx, insn); n = ir_operands_count(ctx, insn);

3
ir_ra.c
View File

@ -57,6 +57,7 @@ int ir_assign_virtual_registers(ir_ctx *ctx)
} }
vregs = ir_mem_calloc(ctx->insns_count, sizeof(ir_ref)); vregs = ir_mem_calloc(ctx->insns_count, sizeof(ir_ref));
n = 1; n = 1;
prev = 0;
for (b = 1, bb = ctx->cfg_blocks + b; b <= ctx->cfg_blocks_count; b++, bb++) { for (b = 1, bb = ctx->cfg_blocks + b; b <= ctx->cfg_blocks_count; b++, bb++) {
if (bb->flags & IR_BB_UNREACHABLE) { if (bb->flags & IR_BB_UNREACHABLE) {
continue; continue;
@ -65,7 +66,7 @@ int ir_assign_virtual_registers(ir_ctx *ctx)
/* skip first instruction */ /* skip first instruction */
insn = ctx->ir_base + i; insn = ctx->ir_base + i;
ctx->prev_ref[i] = 0; ctx->prev_ref[i] = prev;
prev = i; prev = i;
n = ir_operands_count(ctx, insn); n = ir_operands_count(ctx, insn);
n = 1 + (n >> 2); // support for multi-word instructions like MERGE and PHI n = 1 + (n >> 2); // support for multi-word instructions like MERGE and PHI