[llvm-bugs] [Bug 37956] New: [debugify] deadargelim fail

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37956

            Bug ID: 37956
           Summary: [debugify] deadargelim fail
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: greg.bedwell at sony.com
                CC: llvm-bugs at lists.llvm.org
            Blocks: 37953

Created attachment 20476
  --> https://bugs.llvm.org/attachment.cgi?id=20476&action=edit
ll reproducer

$ clang -v
clang version 7.0.0 (trunk 335708) (llvm/trunk 335721)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: e:\work\upstream-llvm\build-vs2015-native-ninja\bin

$ cat dead_argument_elimination.cpp
struct Foo {} *ff;
static Foo bar() { return *ff; }
Foo baz() { return bar(); }

$ clang dead_argument_elimination.cpp -O0 -Xclang -disable-O0-optnone -S
-emit-llvm -o - | opt -sroa -ipsccp -S -o deadargelim-input.ll

$ opt deadargelim-input.ll -debugify-each -deadargelim -disable-output
ERROR: Instruction with empty DebugLoc in function ?bar@@YA?AUFoo@@XZ --  ret
void
WARNING: Missing line 4
CheckModuleDebugify [Dead Argument Elimination]: FAIL
CheckFunctionDebugify [Module Verifier]: PASS
CheckFunctionDebugify [Module Verifier]: PASS


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=37953
[Bug 37953] [meta] [debugify] fix -check-debugify failures
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