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gallium/ttn: fix cursor handling vs builder

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After inserting instructions the cursor.option becomes _after_instr
(even if it started life as an _after_block).  So we cannot simply stash
the current cursor on the if/loop_stack.  Otherwise we end up inserting
instructions after the endif/endloop in the block preceeding the if/
loop.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Rob Clark 2015-09-09 17:27:17 -04:00
parent e50c01d5af
commit 9ce2e30726
1 changed files with 6 additions and 8 deletions
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14
src/gallium/auxiliary/nir/tgsi_to_nir.c
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@ -921,10 +921,6 @@ ttn_if(struct ttn_compile *c, nir_ssa_def *src, bool is_uint)
{
nir_builder *b = &c->build;
/* Save the outside-of-the-if-statement node list. */
c->if_stack[c->if_stack_pos] = b->cursor;
c->if_stack_pos++;
src = ttn_channel(b, src, X);
nir_if *if_stmt = nir_if_create(b->shader);
@ -935,6 +931,9 @@ ttn_if(struct ttn_compile *c, nir_ssa_def *src, bool is_uint)
}
nir_builder_cf_insert(b, &if_stmt->cf_node);
c->if_stack[c->if_stack_pos] = nir_after_cf_node(&if_stmt->cf_node);
c->if_stack_pos++;
b->cursor = nir_after_cf_list(&if_stmt->then_list);
c->if_stack[c->if_stack_pos] = nir_after_cf_list(&if_stmt->else_list);
@ -963,13 +962,12 @@ ttn_bgnloop(struct ttn_compile *c)
{
nir_builder *b = &c->build;
/* Save the outside-of-the-loop node list. */
c->loop_stack[c->loop_stack_pos] = b->cursor;
c->loop_stack_pos++;
nir_loop *loop = nir_loop_create(b->shader);
nir_builder_cf_insert(b, &loop->cf_node);
c->loop_stack[c->loop_stack_pos] = nir_after_cf_node(&loop->cf_node);
c->loop_stack_pos++;
b->cursor = nir_after_cf_list(&loop->body);
}