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Dylan DPC c78e3c735a
Rollup merge of #107411 - cjgillot:dataflow-discriminant, r=oli-obk 
Handle discriminant in DataflowConstProp

cc ``@jachris``
r? ``@JakobDegen``

This PR attempts to extend the DataflowConstProp pass to handle propagation of discriminants. We handle this by adding 2 new variants to `TrackElem`: `TrackElem::Variant` for enum variants and `TrackElem::Discriminant` for the enum discriminant pseudo-place.

The difficulty is that the enum discriminant and enum variants may alias each another. This is the issue of the `Option<NonZeroUsize>` test, which is the equivalent of https://github.com/rust-lang/unsafe-code-guidelines/issues/84 with a direct write.

To handle that, we generalize the flood process to flood all the potentially aliasing places. In particular:
- any write to `(PLACE as Variant)`, either direct or through a projection, floods `(PLACE as OtherVariant)` for all other variants and `discriminant(PLACE)`;
- `SetDiscriminant(PLACE)` floods `(PLACE as Variant)` for each variant.

This implies that flooding is not hierarchical any more, and that an assignment to a non-tracked place may need to flood a tracked place. This is handled by `for_each_aliasing_place` which generalizes `preorder_invoke`.

As we deaggregate enums by putting `SetDiscriminant` last, this allows to propagate the value of the discriminant.

This refactor will allow to make https://github.com/rust-lang/rust/pull/107009 able to handle discriminants too.
2023-02-15 12:24:55 +05:30
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building Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
const_prop Bless 32bit tests. 2023-02-05 13:51:37 +00:00
copy-prop Clearly document intentional UB in mir-opt tests 2023-02-13 13:50:50 -05:00
dataflow-const-prop Rollup merge of #107411 - cjgillot:dataflow-discriminant, r=oli-obk 2023-02-15 12:24:55 +05:30
dead-store-elimination Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deref-patterns Move /src/test to /tests 2023-01-11 09:32:08 +00:00
dest-prop Move /src/test to /tests 2023-01-11 09:32:08 +00:00
inline Bless tests. 2023-02-02 23:26:26 +00:00
issues Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
nll i am free 2023-01-18 04:45:43 +00:00
address_of.address_of_reborrow.SimplifyCfg-initial.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
address_of.borrow_and_cast.SimplifyCfg-initial.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
address_of.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
array_index_is_temporary.main.SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
array_index_is_temporary.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
asm_unwind_panic_abort.main.AbortUnwindingCalls.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
asm_unwind_panic_abort.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
basic_assignment.main.SimplifyCfg-initial.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
basic_assignment.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
bool_compare.opt1.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
bool_compare.opt2.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
bool_compare.opt3.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
bool_compare.opt4.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
bool_compare.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
box_expr.main.ElaborateDrops.before.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
box_expr.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
byte_slice.main.SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
byte_slice.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
combine_array_len.norm2.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
combine_array_len.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
combine_clone_of_primitives.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
combine_clone_of_primitives.{impl#0}-clone.InstCombine.diff Bless tests. 2023-02-02 23:26:26 +00:00
const_allocation.main.ConstProp.after.32bit.mir Bless 32bit. 2023-02-02 23:26:34 +00:00
const_allocation.main.ConstProp.after.64bit.mir Interpret aggregates. 2023-02-02 23:09:51 +00:00
const_allocation.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation2.main.ConstProp.after.32bit.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation2.main.ConstProp.after.64bit.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation2.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation3.main.ConstProp.after.32bit.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation3.main.ConstProp.after.64bit.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation3.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_debuginfo.main.ConstDebugInfo.diff Simplify construction of replacement map. 2023-02-05 11:44:18 +00:00
const_debuginfo.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_goto.issue_77355_opt.ConstGoto.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_goto.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_goto_const_eval_fail.f.ConstGoto.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_goto_const_eval_fail.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_goto_storage.match_nested_if.ConstGoto.diff Bless tests. 2023-02-02 23:26:26 +00:00
const_goto_storage.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_promotion_extern_static.BAR-promoted[0].SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_promotion_extern_static.BAR.PromoteTemps.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_promotion_extern_static.BOP.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_promotion_extern_static.FOO-promoted[0].SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_promotion_extern_static.FOO.PromoteTemps.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_promotion_extern_static.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_prop_miscompile.bar.ConstProp.diff Bless tests. 2023-02-02 23:26:26 +00:00
const_prop_miscompile.foo.ConstProp.diff Bless tests. 2023-02-02 23:26:26 +00:00
const_prop_miscompile.rs Make tests unit. 2023-01-27 18:22:44 +00:00
coverage_graphviz.bar.InstrumentCoverage.0.dot Move /src/test to /tests 2023-01-11 09:32:08 +00:00
coverage_graphviz.main.InstrumentCoverage.0.dot Move /src/test to /tests 2023-01-11 09:32:08 +00:00
coverage_graphviz.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deduplicate_blocks.is_line_doc_comment_2.DeduplicateBlocks.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deduplicate_blocks.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_complex_case.main.Derefer.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_complex_case.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_inline_test.main.Derefer.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_inline_test.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_terminator_test.main.Derefer.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_terminator_test.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_test.main.Derefer.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_test.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_test_multiple.main.Derefer.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
derefer_test_multiple.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
div_overflow.const_dividend.PreCodegen.after.mir Implement SSA CopyProp pass. 2023-01-27 18:22:45 +00:00
div_overflow.const_divisor.PreCodegen.after.mir Implement SSA CopyProp pass. 2023-01-27 18:22:45 +00:00
div_overflow.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch.opt1.EarlyOtherwiseBranch.diff Bless tests. 2023-02-02 23:26:26 +00:00
early_otherwise_branch.opt2.EarlyOtherwiseBranch.diff Bless tests. 2023-02-02 23:26:26 +00:00
early_otherwise_branch.opt3.EarlyOtherwiseBranch.diff Bless tests. 2023-02-02 23:26:26 +00:00
early_otherwise_branch.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_3_element_tuple.opt1.EarlyOtherwiseBranch.diff Bless tests. 2023-02-02 23:26:26 +00:00
early_otherwise_branch_3_element_tuple.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_68867.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_68867.try_sum.EarlyOtherwiseBranch.diff Bless tests. 2023-02-02 23:26:26 +00:00
early_otherwise_branch_noopt.noopt1.EarlyOtherwiseBranch.diff Bless tests. 2023-02-02 23:26:26 +00:00
early_otherwise_branch_noopt.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_soundness.no_deref_ptr.EarlyOtherwiseBranch.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_soundness.no_downcast.EarlyOtherwiseBranch.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_soundness.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
enum_opt.cand.EnumSizeOpt.32bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.cand.EnumSizeOpt.64bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.invalid.EnumSizeOpt.32bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.invalid.EnumSizeOpt.64bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.rs Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.trunc.EnumSizeOpt.32bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.trunc.EnumSizeOpt.64bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.unin.EnumSizeOpt.32bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
enum_opt.unin.EnumSizeOpt.64bit.diff Add de-init to destination place 2023-02-08 02:04:07 +00:00
equal_true.opt.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
equal_true.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
exponential_or.match_tuple.SimplifyCfg-initial.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
exponential_or.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
fn_ptr_shim.core.ops-function-Fn-call.AddMovesForPackedDrops.before.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
fn_ptr_shim.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
funky_arms.float_to_exponential_common.ConstProp.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
funky_arms.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
generator_drop_cleanup.main-{closure#0}.generator_drop.0.mir Bless mir-opt tests. 2023-01-27 22:01:47 +00:00
generator_drop_cleanup.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
generator_storage_dead_unwind.main-{closure#0}.StateTransform.before.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
generator_storage_dead_unwind.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
generator_tiny.main-{closure#0}.generator_resume.0.mir Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
generator_tiny.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
graphviz.main.built.after.dot Move /src/test to /tests 2023-01-11 09:32:08 +00:00
graphviz.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.dont_opt_bool.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.dont_opt_floats.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.dont_remove_comparison.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.opt_char.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.opt_i8.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.opt_multiple_ifs.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.opt_negative.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.opt_u32.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
if_condition_int.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
instrument_coverage.bar.InstrumentCoverage.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
instrument_coverage.main.InstrumentCoverage.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
instrument_coverage.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
intrinsic_asserts.generic.InstCombine.diff InstCombine away intrinsic validity assertions 2023-01-15 16:51:42 -05:00
intrinsic_asserts.panics.InstCombine.diff InstCombine away intrinsic validity assertions 2023-01-15 16:51:42 -05:00
intrinsic_asserts.removable.InstCombine.diff InstCombine away intrinsic validity assertions 2023-01-15 16:51:42 -05:00
intrinsic_asserts.rs InstCombine away intrinsic validity assertions 2023-01-15 16:51:42 -05:00
issue_38669.main.SimplifyCfg-initial.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_38669.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_41110.main.ElaborateDrops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_41110.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_41110.test.ElaborateDrops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_41697.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_41697.{impl#0}-{constant#0}.SimplifyCfg-promote-consts.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_41888.main.ElaborateDrops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_41888.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_62289.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_62289.test.ElaborateDrops.before.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_72181.bar.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_72181.foo.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_72181.main.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_72181.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_72181_1.f.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_72181_1.main.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_72181_1.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_76432.rs Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
issue_76432.test.SimplifyComparisonIntegral.diff Remove both StorageLive and StorageDead in CopyProp. 2023-01-31 17:50:04 +00:00
issue_78192.f.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_78192.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_91633.bar.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_91633.foo.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_91633.fun.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_91633.hey.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_91633.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_99325.main.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_99325.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_101973.inner.ConstProp.diff Remove both StorageLive and StorageDead in CopyProp. 2023-01-31 17:50:04 +00:00
issue_101973.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
loop_test.main.SimplifyCfg-promote-consts.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
loop_test.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len.array_bound.NormalizeArrayLen.diff Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
lower_array_len.array_bound_mut.NormalizeArrayLen.diff Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
lower_array_len.array_len.NormalizeArrayLen.diff Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
lower_array_len.array_len_by_value.NormalizeArrayLen.diff Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
lower_array_len.array_len_raw.NormalizeArrayLen.diff Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
lower_array_len.array_len_reborrow.NormalizeArrayLen.diff Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
lower_array_len.rs Reimplement NormalizeArrayLen. 2023-01-29 21:19:02 +00:00
lower_intrinsics.align_of.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.assume.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.discriminant.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.f_copy_nonoverlapping.LowerIntrinsics.diff Bless tests. 2023-02-02 23:26:26 +00:00
lower_intrinsics.forget.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.non_const.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.size_of.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.unreachable.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics.wrapping.LowerIntrinsics.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics_e2e.f_u64.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics_e2e.f_unit.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_intrinsics_e2e.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_slice_len.bound.LowerSliceLenCalls.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_slice_len.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
match_arm_scopes.complicated_match.SimplifyCfg-initial.after-ElaborateDrops.after.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
match_arm_scopes.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
match_test.main.SimplifyCfg-initial.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
match_test.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
matches_reduce_branches.bar.MatchBranchSimplification.diff Bless tests. 2023-02-02 23:26:26 +00:00
matches_reduce_branches.foo.MatchBranchSimplification.diff Bless tests. 2023-02-02 23:26:26 +00:00
matches_reduce_branches.match_nested_if.MatchBranchSimplification.diff Bless tests. 2023-02-02 23:26:26 +00:00
matches_reduce_branches.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
matches_u8.exhaustive_match.MatchBranchSimplification.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
matches_u8.exhaustive_match_i8.MatchBranchSimplification.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
matches_u8.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
multiple_return_terminators.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
multiple_return_terminators.test.MultipleReturnTerminators.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
no_drop_for_inactive_variant.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
no_drop_for_inactive_variant.unwrap.SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
no_spurious_drop_after_call.main.ElaborateDrops.before.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
no_spurious_drop_after_call.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
not_equal_false.opt.InstCombine.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
not_equal_false.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
nrvo_simple.nrvo.RenameReturnPlace.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
nrvo_simple.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
packed_struct_drop_aligned.main.SimplifyCfg-elaborate-drops.after.mir Bless tests. 2023-02-02 23:26:26 +00:00
packed_struct_drop_aligned.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
README.md Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_fake_borrows.match_guard.CleanupPostBorrowck.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_fake_borrows.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_never_const.no_codegen.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_never_const.rs Change src/test to tests in source files, fix tidy and tests 2023-01-11 09:32:13 +00:00
remove_storage_markers.main.RemoveStorageMarkers.diff Bless tests. 2023-02-02 23:26:26 +00:00
remove_storage_markers.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_unneeded_drops.cannot_opt_generic.RemoveUnneededDrops.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_unneeded_drops.dont_opt.RemoveUnneededDrops.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_unneeded_drops.opt.RemoveUnneededDrops.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_unneeded_drops.opt_generic_copy.RemoveUnneededDrops.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_unneeded_drops.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
remove_zsts.get_union.PreCodegen.after.mir Bless tests. 2023-02-02 23:26:26 +00:00
remove_zsts.get_union.RemoveZsts.diff Bless tests. 2023-02-02 23:26:26 +00:00
remove_zsts.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
retag.array_casts.SimplifyCfg-elaborate-drops.after.mir Bless tests. 2023-02-02 23:26:26 +00:00
retag.core.ptr-drop_in_place.Test.SimplifyCfg-make_shim.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
retag.main-{closure#0}.SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
retag.main.SimplifyCfg-elaborate-drops.after.mir Bless tests. 2023-02-02 23:26:26 +00:00
retag.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
retag.{impl#0}-foo.SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
retag.{impl#0}-foo_shr.SimplifyCfg-elaborate-drops.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
return_an_array.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
separate_const_switch.identity.SeparateConstSwitch.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
separate_const_switch.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
separate_const_switch.too_complex.SeparateConstSwitch.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
simple_option_map_e2e.ezmap.PreCodegen.after.mir Rollup merge of #107662 - cjgillot:copy-projection, r=oli-obk 2023-02-07 17:57:15 +01:00
simple_option_map_e2e.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_arm.id_try.SimplifyArmIdentity.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_arm.id_try.SimplifyBranchSame.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_arm.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_arm_identity.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_cfg.main.SimplifyCfg-early-opt.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_cfg.main.SimplifyCfg-initial.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_cfg.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_if.main.SimplifyConstCondition-after-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_if.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.c.SimplifyLocals-before-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.d1.SimplifyLocals-before-const-prop.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
simplify_locals.d2.SimplifyLocals-before-const-prop.diff Bless tests. 2023-02-02 23:26:26 +00:00
simplify_locals.expose_addr.SimplifyLocals-before-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.r.SimplifyLocals-before-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.t1.SimplifyLocals-before-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.t2.SimplifyLocals-before-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.t3.SimplifyLocals-before-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals.t4.SimplifyLocals-before-const-prop.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals_fixedpoint.foo.SimplifyLocals-final.diff Bless tests. 2023-02-02 23:26:26 +00:00
simplify_locals_fixedpoint.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals_removes_unused_consts.main.SimplifyLocals-before-const-prop.diff Bless tests. 2023-02-02 23:26:26 +00:00
simplify_locals_removes_unused_consts.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_locals_removes_unused_discriminant_reads.map.SimplifyLocals-before-const-prop.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
simplify_locals_removes_unused_discriminant_reads.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_match.main.ConstProp.diff Remove both StorageLive and StorageDead in CopyProp. 2023-01-31 17:50:04 +00:00
simplify_match.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_try_if_let.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
simplify_try_if_let.{impl#0}-append.SimplifyArmIdentity.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
slice_drop_shim.core.ptr-drop_in_place.[String].AddMovesForPackedDrops.before.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
slice_drop_shim.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
slice_filter.rs Implement SSA CopyProp pass. 2023-01-27 18:22:45 +00:00
slice_filter.variant_a-{closure#0}.CopyProp.diff Remove both StorageLive and StorageDead in CopyProp. 2023-01-31 17:50:04 +00:00
slice_filter.variant_a-{closure#0}.DestinationPropagation.diff Remove both StorageLive and StorageDead in CopyProp. 2023-01-31 17:50:04 +00:00
slice_filter.variant_b-{closure#0}.CopyProp.diff Remove both StorageLive and StorageDead in CopyProp. 2023-01-31 17:50:04 +00:00
slice_filter.variant_b-{closure#0}.DestinationPropagation.diff Remove both StorageLive and StorageDead in CopyProp. 2023-01-31 17:50:04 +00:00
spanview_block.main.built.after.html Move /src/test to /tests 2023-01-11 09:32:08 +00:00
spanview_block.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
spanview_statement.main.built.after.html Move /src/test to /tests 2023-01-11 09:32:08 +00:00
spanview_statement.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
spanview_terminator.main.built.after.html Move /src/test to /tests 2023-01-11 09:32:08 +00:00
spanview_terminator.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
sroa.constant.ScalarReplacementOfAggregates.diff Put deaggregated statements after original constant. 2023-02-09 17:27:31 +00:00
sroa.copies.ScalarReplacementOfAggregates.diff Run SROA to fixpoint. 2023-02-05 12:08:42 +00:00
sroa.dropping.ScalarReplacementOfAggregates.diff Bless tests. 2023-02-02 23:26:26 +00:00
sroa.enums.ScalarReplacementOfAggregates.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
sroa.escaping.ScalarReplacementOfAggregates.diff Clearly document intentional UB in mir-opt tests 2023-02-13 13:50:50 -05:00
sroa.flat.ScalarReplacementOfAggregates.diff Make SROA expand assignments. 2023-02-05 11:42:11 +00:00
sroa.ref_copies.ScalarReplacementOfAggregates.diff Simplify construction of replacement map. 2023-02-05 11:44:18 +00:00
sroa.rs Rollup merge of #107971 - saethlin:mir-opt-ub, r=cjgillot 2023-02-13 23:25:13 +01:00
sroa.structs.ScalarReplacementOfAggregates.diff Simplify construction of replacement map. 2023-02-05 11:44:18 +00:00
sroa.unions.ScalarReplacementOfAggregates.diff Bless tests. 2023-02-02 23:26:26 +00:00
storage_ranges.main.nll.0.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
storage_ranges.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
tls_access.main.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
tls_access.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
try_identity_e2e.new.PreCodegen.after.mir Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
try_identity_e2e.old.PreCodegen.after.mir Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
try_identity_e2e.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_enum.process_never.SimplifyLocals-final.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_enum.process_void.SimplifyLocals-final.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_enum.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_enum_branching.main.SimplifyCfg-after-uninhabited-enum-branching.after.mir Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
uninhabited_enum_branching.main.UninhabitedEnumBranching.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
uninhabited_enum_branching.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_enum_branching2.main.SimplifyCfg-after-uninhabited-enum-branching.after.mir Bless tests. 2023-02-02 23:26:26 +00:00
uninhabited_enum_branching2.main.UninhabitedEnumBranching.diff Bless tests. 2023-02-02 23:26:26 +00:00
uninhabited_enum_branching2.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_fallthrough_elimination.eliminate_fallthrough.UninhabitedEnumBranching.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_fallthrough_elimination.keep_fallthrough.UninhabitedEnumBranching.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
uninhabited_fallthrough_elimination.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unreachable.main.UnreachablePropagation.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unreachable.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unreachable_diverging.main.UnreachablePropagation.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unreachable_diverging.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unusual_item_types.core.ptr-drop_in_place.Vec_i32_.AddMovesForPackedDrops.before.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unusual_item_types.E-V-{constant#0}.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unusual_item_types.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
unusual_item_types.Test-X-{constructor#0}.built.after.mir Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
unusual_item_types.{impl#0}-ASSOCIATED_CONSTANT.built.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
while_let_loops.change_loop_body.ConstProp.diff Stop deaggregating enums in MIR. 2023-02-02 23:20:27 +00:00
while_let_loops.change_loop_body.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
while_let_loops.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
while_storage.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
while_storage.while_loop.PreCodegen.after.mir Implement SSA CopyProp pass. 2023-01-27 18:22:45 +00:00

README.md

This folder contains tests for MIR optimizations.

The mir-opt test format emits MIR to extra files that you can automatically update by specifying --bless on the command line (just like ui tests updating .stderr files).

--blessable test format

By default 32 bit and 64 bit targets use the same dump files, which can be problematic in the presence of pointers in constants or other bit width dependent things. In that case you can add

// EMIT_MIR_FOR_EACH_BIT_WIDTH

to your test, causing separate files to be generated for 32bit and 64bit systems.

Unit testing

If you are only testing the behavior of a particular mir-opt pass on some specific input (as is usually the case), you should add

// unit-test: PassName

to the top of the file. This makes sure that other passes don't run which means you'll get the input you expected and your test won't break when other code changes.

Emit a diff of the mir for a specific optimization

This is what you want most often when you want to see how an optimization changes the MIR.

// EMIT_MIR $file_name_of_some_mir_dump.diff

Emit mir after a specific optimization

Use this if you are just interested in the final state after an optimization.

// EMIT_MIR $file_name_of_some_mir_dump.after.mir

Emit mir before a specific optimization

This exists mainly for completeness and is rarely useful.

// EMIT_MIR $file_name_of_some_mir_dump.before.mir