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llvm-project/llvm/test/DebugInfo
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Jeremy Morse 00e238896c [DebugInfo] Nerf placeDbgValues, with prejudice 
CodeGenPrepare::placeDebugValues moves variable location intrinsics to be
immediately after the Value they refer to. This makes tracking of locations
very easy; but it changes the order in which assignments appear to the
debugger, from the source programs order to the order in which the
optimised program computes values. This then leads to PR43986 and PR38754,
where variable locations that were in a conditional block are made
unconditional, which is highly misleading.

This patch adjusts placeDbgValues to only re-order variable location
intrinsics if they use a Value before it is defined, significantly reducing
the damage that it does. This is still not 100% safe, but the rest of
CodeGenPrepare needs polishing to correctly update debug info when
optimisations are performed to fully fix this.

This will probably break downstream debuginfo tests -- if the
instruction-stream position of variable location changes isn't the focus of
the test, an easy fix should be to manually apply placeDbgValues' behaviour
to the failing tests, moving dbg.value intrinsics next to SSA variable
definitions thus:

  %foo = inst1
  %bar = ...
  %baz = ...
  void call @llvm.dbg.value(metadata i32 %foo, ...

to

  %foo = inst1
  void call @llvm.dbg.value(metadata i32 %foo, ...
  %bar = ...
  %baz = ...

This should return your test to exercising whatever it was testing before.

Differential Revision: https://reviews.llvm.org/D58453
 		2019-12-09 12:52:10 +00:00
..
AArch64 [ISEL][ARM][AARCH64] Tracking simple parameter forwarding registers 2019-10-08 09:43:05 +00:00
AMDGPU
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ARM [DebugInfo] Remove the DIFlagArgumentNotModified debug info flag 2019-11-20 13:18:40 +01:00
COFF [DebugInfo] Nerf placeDbgValues, with prejudice 2019-12-09 12:52:10 +00:00
Generic Attempt to fix a debuginfo test that wasn't as generic as I thought 2019-12-06 12:51:58 +00:00
Inputs [llvm-symbolizer] Support debug file lookup using build ID 2019-12-04 15:07:56 -08:00
Lanai
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MIR [DebugInfo] Make describeLoadedValue() reg aware 2019-12-09 10:47:49 +01:00
MSP430 MachineOperand/MIParser: Do not print debug-use flag, infer it 2018-10-30 23:28:27 +00:00
Mips Re-commit "DWARF location lists: Add section index dumping" 2019-11-18 15:30:10 +01:00
NVPTX [DebugInfo] Nerf placeDbgValues, with prejudice 2019-12-09 12:52:10 +00:00
PDB Make pdbdump-objfilename test work again 2019-07-09 17:02:51 +00:00
PowerPC
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RISCV [Object][RISCV][test] Improve DebugInfo/RISCV/relax-debug-frame.ll 2019-11-26 09:16:55 -08:00
Sparc [DebugInfo] Remove the DIFlagArgumentNotModified debug info flag 2019-11-20 13:18:40 +01:00
SystemZ [lit] Delete empty lines at the end of lit.local.cfg NFC 2019-06-17 09:51:07 +00:00
WebAssembly LiveIntervals: Split live intervals on multiple dead defs 2019-10-30 08:50:46 -05:00
X86 [DebugInfo] Nerf placeDbgValues, with prejudice 2019-12-09 12:52:10 +00:00
arange-overlap.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#1) 2019-01-31 14:11:17 +00:00
arm-relocs.test
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check-debugify-preserves-analyses.ll
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cross-cu-inlining.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#1) 2019-01-31 14:11:17 +00:00
cross-cu-scope.ll Specify REQUIRES: default_triple in two debuginfo tests 2018-11-06 00:16:32 +00:00
debugify-bogus-dbg-value.ll
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debugify-each.ll
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debugify-export.ll
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debugify-report-missing-locs-only.ll
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debugify.ll [DebugInfo] IR/Bitcode changes for DISubprogram flags. 2018-11-28 21:14:32 +00:00
debuglineinfo-macho.test
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debuglineinfo-path.ll [llvm-nm][llvm-readelf] Avoid single-dash -long-option in tests 2019-04-27 16:12:14 +00:00
debuglineinfo.test Reapply: DebugInfo: Assume an absence of ranges or high_pc on a CU means the CU is empty (devoid of code addresses) 2018-12-21 22:25:01 +00:00
debugmacinfo-dwo.test [DebugInfo] Support for debug_macinfo.dwo section in llvm and llvm-dwarfdump. 2019-12-03 08:54:12 +05:30
debugmacinfo.test
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dwarfdump-64-bit-dwarf.test [CommandLine] Don't allow unlimitted dashes for options. Part 1 or 5 2019-04-29 18:34:18 +00:00
dwarfdump-accel.test
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dwarfdump-bad-lookup-address.test [DWARF] check whether the DIE is valid before querying for information 2019-04-03 17:13:45 +00:00
dwarfdump-debug-frame-simple.test
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dwarfdump-decompression-corrupt.test
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dwarfdump-decompression-error.test
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dwarfdump-dump-flags.test
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dwarfdump-dump-gdbindex.test [llvm-dwarfdump] --gdb-index: fix uninitialized TuListOffset 2019-06-19 13:51:29 +00:00
dwarfdump-dwp.test
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dwarfdump-implicit-const.test
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dwarfdump-invalid-line-table.test
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dwarfdump-invalid.test
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dwarfdump-macho-relocs.test
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dwarfdump-macho-universal.test
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dwarfdump-objc.test
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dwarfdump-pubnames.test
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dwarfdump-ranges.test
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dwarfdump-type-units.test
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dwarfdump-zlib.test
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dwo.ll
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gcc-local-mem-func.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#1) 2019-01-31 14:11:17 +00:00
high-pc-constant.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#1) 2019-01-31 14:11:17 +00:00
invalid-relocations.test [yaml2obj][obj2yaml] - Change how symbol's binding is descibed when parsing/dumping. 2019-04-03 14:53:42 +00:00
macro_link.ll
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member-pointers.o
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missing-abstract-variable.o
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omit-empty.ll
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pr34186.ll
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pr34672.ll
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precomp.test [llvm-readobj] Change -long-option to --long-option in tests. NFC 2019-05-01 05:27:20 +00:00
skeletoncu.ll
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strip-DIGlobalVariable.ll
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strip-loop-metadata.ll
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strip-module-flags.ll
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symbolize-64bit-address.test [DebugInfo][llvm-symbolizer]Add some tests for edge cases when symbolizing 2019-02-06 10:13:14 +00:00
symbolize-absolute-path-in-debug-line.s [DebugInfo][llvm-symbolizer]Add some tests for edge cases when symbolizing 2019-02-06 10:13:14 +00:00
symbolize-build-id.test [llvm-symbolizer] Support debug file lookup using build ID 2019-12-04 15:07:56 -08:00
symbolize-demangling.s [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#2) 2019-01-31 14:17:33 +00:00
symbolize-directory.s Fix more Windows bots after r360015. 2019-05-06 19:12:25 +00:00
symbolize-gnu-debuglink-fallback.test [DebugInfo] Fix /usr/lib/debug llvm-symbolizer lookup with relative paths 2019-02-11 18:05:48 +00:00
symbolize-gnu-debuglink-no-realpath.test [DebugInfo] Fix mkdir use in test 2019-02-01 21:14:21 +00:00
symbolize-gnu-debuglink.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#3) 2019-01-31 14:22:50 +00:00
symbolize-inlined.test [test][tools] Add missing and improve testing 2019-12-09 12:24:23 +00:00
symbolize-macho-universal-unknown-arch.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#2) 2019-01-31 14:17:33 +00:00
symbolize-macho-universal.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#2) 2019-01-31 14:17:33 +00:00
symbolize-missing-file.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#3) 2019-01-31 14:22:50 +00:00
symbolize-no-debug-str.test [DebugInfo][llvm-symbolizer]Add some tests for edge cases when symbolizing 2019-02-06 10:13:14 +00:00
symbolize-shared-abbrev.s [DebugInfo][llvm-symbolizer]Add some tests for edge cases when symbolizing 2019-02-06 10:13:14 +00:00
symbolize-split-dwarf-empty.test [llvm-symbolizer][test] Rename and tweak tests using llvm-symbolizer 2019-02-01 10:24:55 +00:00
symbolize-split-dwarf-no-skel-address.test [llvm-symbolizer][test] Rename and tweak tests using llvm-symbolizer 2019-02-01 10:24:55 +00:00
symbolize-stripped-sections.test [DebugInfo][llvm-symbolizer]Add some tests for edge cases when symbolizing 2019-02-06 10:13:14 +00:00
symbolize-stripped.test [llvm-symbolizer][test] Extract tests from llvm-symbolizer.test and simplify (#1) 2019-01-31 14:11:17 +00:00
symbolize-tu.test [llvm-symbolizer][test] Rename and tweak tests using llvm-symbolizer 2019-02-01 10:24:55 +00:00
symbolize-zlib.test [llvm-symbolizer][test] Rename and tweak tests using llvm-symbolizer 2019-02-01 10:24:55 +00:00
symbolize.test [llvm-symbolizer][test] Rename and tweak tests using llvm-symbolizer 2019-02-01 10:24:55 +00:00
typeunit-header.test
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unrolled-loop-remainder.ll Remove irrelevant references to legacy git repositories from 2019-01-15 16:18:52 +00:00