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SPIRV-Tools/source/opt
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Steven Perron 1254335d13
Don't unswitch the latch block. (#2205) 
Loop unswitching is unswitching the conditional branch that creates the
back-edge. In the version of the loop, where the bachedge is not taken,
there is no back-edge. This is what causes the validator to complain.

The solution I will go with will be to now unswitch a condition with a
back-edge. At this time we do not now if loop unswitching is used. We do
not include it in the optimization sets provided, nor is it used in
glslang's set. When there are opportunities and no breaks from the loop,
the loop with either be a single iteration loop, or an infinite loop.
There is no performance advantage to performing loop unswitching in
either of those cases. If there is a break, maintaining structured
control flow will be tricky. Unless we see a clear advantage to handling
these case, I would go with the safer simpler solution.

Fixes #2201.
2018-12-18 18:15:00 +00:00
..
aggressive_dead_code_elim_pass.cpp Invalidate the decoration manager at the start of ADCE. (#2189) 2018-12-10 13:24:33 -05:00
aggressive_dead_code_elim_pass.h Fix ADCE liveness to include all enclosing control structures. (#1975) 2018-10-16 08:00:07 -04:00
basic_block.cpp Keep analyses live in unrolling (#1929) 2018-09-26 17:36:27 -04:00
basic_block.h Add base and core bindless validation instrumentation classes (#2014) 2018-11-08 13:54:54 -05:00
block_merge_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
block_merge_pass.h Analyze uses for all instructions. (#1937) 2018-09-28 14:39:06 -04:00
build_module.cpp Move make_unique to source/util. (#1836) 2018-08-14 12:44:54 -04:00
build_module.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
ccp_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
ccp_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
cfg_cleanup_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
cfg_cleanup_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
cfg.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
cfg.h Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
CMakeLists.txt Update memory model (#1904) 2018-11-30 14:15:51 -05:00
combine_access_chains.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
combine_access_chains.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
common_uniform_elim_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
common_uniform_elim_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
compact_ids_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
compact_ids_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
composite.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
composite.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
const_folding_rules.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
const_folding_rules.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
constants.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
constants.h Have the constant manager take ownership of constants. (#1866) 2018-08-27 09:53:47 -04:00
copy_prop_arrays.cpp Add a nullptr check to array copy propagation. (#1987) 2018-10-19 12:53:40 -04:00
copy_prop_arrays.h Fix erroneous uses of the type manager in copy-prop-arrays. (#1942) 2018-10-01 14:45:44 -04:00
dead_branch_elim_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
dead_branch_elim_pass.h Fix dead branch elim infinite loop. (#2009) 2018-10-24 09:10:30 -04:00
dead_insert_elim_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
dead_insert_elim_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
dead_variable_elimination.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
dead_variable_elimination.h Add testing framework for tools. 2018-08-17 15:03:14 -04:00
decoration_manager.cpp Invalidate the decoration manager at the start of ADCE. (#2189) 2018-12-10 13:24:33 -05:00
decoration_manager.h Invalidate the decoration manager at the start of ADCE. (#2189) 2018-12-10 13:24:33 -05:00
def_use_manager.cpp Add base and core bindless validation instrumentation classes (#2014) 2018-11-08 13:54:54 -05:00
def_use_manager.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
dominator_analysis.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
dominator_analysis.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
dominator_tree.cpp Fix readbility/braces warnings (#1804) 2018-08-07 09:09:47 -04:00
dominator_tree.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
eliminate_dead_constant_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
eliminate_dead_constant_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
eliminate_dead_functions_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
eliminate_dead_functions_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
feature_manager.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
feature_manager.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
flatten_decoration_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
flatten_decoration_pass.h Add testing framework for tools. 2018-08-17 15:03:14 -04:00
fold_spec_constant_op_and_composite_pass.cpp Have the constant manager take ownership of constants. (#1866) 2018-08-27 09:53:47 -04:00
fold_spec_constant_op_and_composite_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
fold.cpp Remove undefined behaviour when folding shifts. (#2157) 2018-12-04 10:04:02 -05:00
fold.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
folding_rules.cpp Fix folding of volatile store. (#2048) 2018-11-14 13:52:18 -05:00
folding_rules.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
freeze_spec_constant_value_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
freeze_spec_constant_value_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
function.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
function.h Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
if_conversion.cpp Fix restrictions in if conversion (#1998) 2018-10-19 15:16:46 -04:00
if_conversion.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
inline_exhaustive_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
inline_exhaustive_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
inline_opaque_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
inline_opaque_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
inline_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
inline_pass.h Don't assume one return means function can be inlined. (#2018) (#2025) 2018-11-08 09:11:20 -05:00
inst_bindless_check_pass.cpp Add base and core bindless validation instrumentation classes (#2014) 2018-11-08 13:54:54 -05:00
inst_bindless_check_pass.h Add missing overrides (#2041) 2018-11-12 15:11:32 -05:00
instruction_list.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
instruction_list.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
instruction.cpp Fix Instruction::IsFloatingPointFoldingAllowed() 2018-11-14 15:25:51 -07:00
instruction.h New spirv-reduce reduction pass: operand to dominating id. (#2099) 2018-11-26 17:06:21 -05:00
instrument_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
instrument_pass.h Add missing overrides (#2041) 2018-11-12 15:11:32 -05:00
ir_builder.h Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
ir_context.cpp Invalidate the decoration manager at the start of ADCE. (#2189) 2018-12-10 13:24:33 -05:00
ir_context.h Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
ir_loader.cpp Use MakeUnique. (#1837) 2018-08-14 15:01:50 -04:00
ir_loader.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
iterator.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
licm_pass.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
licm_pass.h Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
local_access_chain_convert_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
local_access_chain_convert_pass.h Keep decorations when replacing loads in access-chain-convert. (#1829) 2018-08-15 09:14:21 -04:00
local_redundancy_elimination.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
local_redundancy_elimination.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
local_single_block_elim_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
local_single_block_elim_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
local_single_store_elim_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
local_single_store_elim_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
local_ssa_elim_pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
local_ssa_elim_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
log.h Rewrite include guards (#1793) 2018-08-03 08:05:33 -04:00
loop_dependence_helpers.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_dependence.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_dependence.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_descriptor.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
loop_descriptor.h Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
loop_fission.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
loop_fission.h Add testing framework for tools. 2018-08-17 15:03:14 -04:00
loop_fusion_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_fusion_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_fusion.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_fusion.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_peeling.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
loop_peeling.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_unroller.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
loop_unroller.h Keep analyses live in unrolling (#1929) 2018-09-26 17:36:27 -04:00
loop_unswitch_pass.cpp Don't unswitch the latch block. (#2205) 2018-12-18 18:15:00 +00:00
loop_unswitch_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
loop_utils.cpp Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
loop_utils.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
mem_pass.cpp Consider atomics that load when analyzing live stores in ADCE (#1956) (#1958) 2018-10-12 08:46:35 -04:00
mem_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
merge_return_pass.cpp Fix invalid OpPhi generated by merge-return. (#2172) 2018-12-07 14:10:30 -05:00
merge_return_pass.h Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
module.cpp Add option for the max id bound. (#1870) 2018-09-10 11:49:41 -04:00
module.h Add option for the max id bound. (#1870) 2018-09-10 11:49:41 -04:00
null_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
optimizer.cpp Add --target-env flag to spirv-opt (#2216) 2018-12-17 16:54:23 -05:00
pass_manager.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
pass_manager.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
pass.cpp Don't inline recursive functions. (#2130) 2018-11-29 14:24:58 -05:00
pass.h Document in the context what happens with id overflow. (#2159) 2018-12-06 09:07:00 -05:00
passes.h Update memory model (#1904) 2018-11-30 14:15:51 -05:00
pch_source_opt.cpp Enable precompiled headers for spirv-tools(-shared) and some unit tests (#2026) 2018-11-06 09:26:23 -05:00
pch_source_opt.h Enable precompiled headers for spirv-tools(-shared) and some unit tests (#2026) 2018-11-06 09:26:23 -05:00
private_to_local_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
private_to_local_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
process_lines_pass.cpp Add passes to propagate and eliminate redundant line instructions (#2027). (#2039) 2018-11-15 14:06:17 -05:00
process_lines_pass.h Add missing override to ProcessLinesPass 2018-11-19 19:24:48 -05:00
propagator.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
propagator.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
reduce_load_size.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
reduce_load_size.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
redundancy_elimination.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
redundancy_elimination.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
reflect.h Recognize OpTypeAccelerationStructureNV as a type instruction (#2190) 2018-12-11 19:03:55 -05:00
register_pressure.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
register_pressure.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
remove_duplicates_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
remove_duplicates_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
replace_invalid_opc.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
replace_invalid_opc.h Add testing framework for tools. 2018-08-17 15:03:14 -04:00
scalar_analysis_nodes.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
scalar_analysis_simplification.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
scalar_analysis.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
scalar_analysis.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
scalar_replacement_pass.cpp Don't scalarize spec constant sized arrays 2018-10-04 11:58:23 -04:00
scalar_replacement_pass.h Don't scalarize spec constant sized arrays 2018-10-04 11:58:23 -04:00
set_spec_constant_default_value_pass.cpp Move make_unique to source/util. (#1836) 2018-08-14 12:44:54 -04:00
set_spec_constant_default_value_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
simplification_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
simplification_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
ssa_rewrite_pass.cpp SSA-rewriter: make sure phi entries are unique. (#2206) 2018-12-18 18:14:27 +00:00
ssa_rewrite_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
strength_reduction_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
strength_reduction_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
strip_debug_info_pass.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
strip_debug_info_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
strip_reflect_info_pass.cpp Remove MemberDecorateStringGOOGLE during stript-refect. (#2021) 2018-10-30 16:17:35 -04:00
strip_reflect_info_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
struct_cfg_analysis.cpp Check for unreachable blocks in merge-return. (#1966) 2018-10-10 15:18:15 -04:00
struct_cfg_analysis.h Check for unreachable blocks in merge-return. (#1966) 2018-10-10 15:18:15 -04:00
tree_iterator.h Rewrite include guards (#1793) 2018-08-03 08:05:33 -04:00
type_manager.cpp Recognize OpTypeAccelerationStructureNV as a type instruction (#2190) 2018-12-11 19:03:55 -05:00
type_manager.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
types.cpp Recognize OpTypeAccelerationStructureNV as a type instruction (#2190) 2018-12-11 19:03:55 -05:00
types.h Recognize OpTypeAccelerationStructureNV as a type instruction (#2190) 2018-12-11 19:03:55 -05:00
unify_const_pass.cpp Move make_unique to source/util. (#1836) 2018-08-14 12:44:54 -04:00
unify_const_pass.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
upgrade_memory_model.cpp Update memory model (#1904) 2018-11-30 14:15:51 -05:00
upgrade_memory_model.h Update memory model (#1904) 2018-11-30 14:15:51 -05:00
value_number_table.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
value_number_table.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
vector_dce.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
vector_dce.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
workaround1209.cpp Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00
workaround1209.h Cleanup includes. (#1795) 2018-08-03 15:06:09 -04:00