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spirv: Restructure the case loop in OpSwitch handling

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Instead of calling vtn_add_case for the default case and then looping,
add an is_default variable and do everything inside the loop.  This will
make the next commit easier.

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Jason Ekstrand 2017-12-06 10:09:28 -08:00
parent 5f572ccc95
commit 58cabae8cc
1 changed files with 11 additions and 3 deletions
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14
src/compiler/spirv/vtn_cfg.c
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@ -425,9 +425,17 @@ vtn_cfg_walk_blocks(struct vtn_builder *b, struct list_head *cf_list,
const uint32_t *branch_end =
block->branch + (block->branch[0] >> SpvWordCountShift);
vtn_add_case(b, swtch, break_block, block->branch[2], 0, true);
for (const uint32_t *w = block->branch + 3; w < branch_end; w += 2)
vtn_add_case(b, swtch, break_block, w[1], w[0], false);
bool is_default = true;
for (const uint32_t *w = block->branch + 2; w < branch_end;) {
uint32_t literal = 0;
if (!is_default)
literal = *(w++);
uint32_t block_id = *(w++);
vtn_add_case(b, swtch, break_block, block_id, literal, is_default);
is_default = false;
}
/* Now, we go through and walk the blocks. While we walk through
* the blocks, we also gather the much-needed fall-through