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6885733c41
rust/tests/mir-opt
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Ulrich Weigand 6885733c41 Fix mir-opt tests for big-endian platforms 
The test cases src/test/mir-opt/building/custom/consts.rs and
src/test/mir-opt/const_prop/mutable_variable_no_prop.rs are
currently failing on big-endian platforms as the binary encoding
of some constants is hard-coded in the MIR test files.  Fix this
by choosing constant values that have the same encoding on big-
and little-endian platforms.

The test case src/test/mir-opt/issues/issue_75439.rs is failing
as well, but since the purpose of the test is to validate handling
of big-endian integer encodings on a little-endian platform, it does
not make much sense to run it on big-endian platforms in the first
place - we can just ignore it there.

Fixed part of https://github.com/rust-lang/rust/issues/105383.
2023-01-12 18:05:30 +01:00
..
building Fix mir-opt tests for big-endian platforms 2023-01-12 18:05:30 +01:00
const_prop Fix mir-opt tests for big-endian platforms 2023-01-12 18:05:30 +01:00
dataflow-const-prop Move /src/test to /tests 2023-01-11 09:32:08 +00:00
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 Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issues Fix mir-opt tests for big-endian platforms 2023-01-12 18:05:30 +01:00
nll Move /src/test to /tests 2023-01-11 09:32:08 +00:00
76803_regression.encode.SimplifyBranchSame.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
76803_regression.rs Move /src/test to /tests 2023-01-11 09:32:08 +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.{impl#0}-clone.InstCombine.diff 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
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_allocation.main.ConstProp.after.32bit.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation.main.ConstProp.after.64bit.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_allocation.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_debuginfo.main.ConstDebugInfo.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_debuginfo.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 Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_goto_storage.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_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 Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_prop_miscompile.foo.ConstProp.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
const_prop_miscompile.rs Move /src/test to /tests 2023-01-11 09:32:08 +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
deaggregator_test_enum_2.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deaggregator_test_enum_2.test1.Deaggregator.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deaggregator_test_enum.bar.Deaggregator.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deaggregator_test_enum.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deaggregator_test_multiple.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deaggregator_test_multiple.test.Deaggregator.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deaggregator_test.bar.Deaggregator.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
deaggregator_test.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_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
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
div_overflow.const_dividend.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
div_overflow.const_divisor.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
div_overflow.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_3_element_tuple.opt1.EarlyOtherwiseBranch.diff Move /src/test to /tests 2023-01-11 09:32:08 +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 Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch_noopt.noopt1.EarlyOtherwiseBranch.diff Move /src/test to /tests 2023-01-11 09:32:08 +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
early_otherwise_branch.opt1.EarlyOtherwiseBranch.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch.opt2.EarlyOtherwiseBranch.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch.opt3.EarlyOtherwiseBranch.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
early_otherwise_branch.rs Move /src/test to /tests 2023-01-11 09:32:08 +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 Move /src/test to /tests 2023-01-11 09:32:08 +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 Move /src/test to /tests 2023-01-11 09:32:08 +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 Move /src/test to /tests 2023-01-11 09:32:08 +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
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.{impl#0}-{constant#0}.SimplifyCfg-promote-consts.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_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_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_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_73223.main.SimplifyArmIdentity.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_73223.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_76432.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
issue_76432.test.SimplifyComparisonIntegral.diff Move /src/test to /tests 2023-01-11 09:32:08 +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 Move /src/test to /tests 2023-01-11 09:32:08 +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_e2e.array_bound_mut.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len_e2e.array_bound.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len_e2e.array_len_by_value.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len_e2e.array_len.PreCodegen.after.mir Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len_e2e.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len.array_bound_mut.NormalizeArrayLen.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len.array_bound.NormalizeArrayLen.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len.array_len_by_value.NormalizeArrayLen.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len.array_len.NormalizeArrayLen.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
lower_array_len.rs 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_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 Move /src/test to /tests 2023-01-11 09:32:08 +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_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 Move /src/test to /tests 2023-01-11 09:32:08 +00:00
matches_reduce_branches.foo.MatchBranchSimplification.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
matches_reduce_branches.match_nested_if.MatchBranchSimplification.diff Move /src/test to /tests 2023-01-11 09:32:08 +00:00
matches_reduce_branches.rs 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.exhaustive_match.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
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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