[lldb-dev] [Bug 44774] New: basic_entry_values_x86_64 failing due to compiler changes

[via lldb-dev]

https://bugs.llvm.org/show_bug.cgi?id=44774

            Bug ID: 44774
           Summary: basic_entry_values_x86_64 failing due to compiler
                    changes
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: vsk at apple.com
                CC: jdevlieghere at apple.com, llvm-bugs at lists.llvm.org

The basic_entry_values_x86_64 test has started failing today due to an argument
being optimized out:

```
--- FileCheck trace (code=1) ---
/Users/vsk/src/builds/llvm-ub-hardening-RA/bin/FileCheck
/Users/vsk/src/llvm-ub-hardening/lldb/packages/Python/lldbsuite/test/functionalities/param_entry_vals/basic_entry_values_x86_64/main.cpp
-check-prefix=FUNC1-DESC

FileCheck input:
      Address: a.out[0x0000000100000d68] (a.out.__TEXT.__text + 24)
      Summary: a.out`func1(int&, int) + 24 at main.cpp:52:1
       Module: file =
"/Users/vsk/src/builds/llvm-ub-hardening-RA/lldb-test-build.noindex/functionalities/param_entry_vals/basic_entry_values_x86_64/lldbsuite.test.lldbtest.test_dsym/a.out",
arch = "x86_64"
  CompileUnit: id = {0x00000000}, file =
"/Users/vsk/src/llvm-ub-hardening/lldb/packages/Python/lldbsuite/test/functionalities/param_entry_vals/basic_entry_values_x86_64/main.cpp",
language = "c++11"
     Function: id = {0x7fffffff0000002e}, name = "func1(int&, int)", mangled =
"_Z5func1Rii", range = [0x0000000103f25d50-0x0000000103f25d6f)
     FuncType: id = {0x7fffffff0000002e}, byte-size = 0, decl = main.cpp:35,
compiler_type = "void (int &, int)"
       Blocks: id = {0x7fffffff0000002e}, range = [0x103f25d50-0x103f25d6f)
    LineEntry: [0x0000000103f25d68-0x0000000103f25d6f):
/Users/vsk/src/llvm-ub-hardening/lldb/packages/Python/lldbsuite/test/functionalities/param_entry_vals/basic_entry_values_x86_64/main.cpp:52:1
       Symbol: id = {0x00000006}, range =
[0x0000000103f25d50-0x0000000103f25d70), name="func1(int&, int)",
mangled="_Z5func1Rii"



FileCheck output:

/Users/vsk/src/llvm-ub-hardening/lldb/packages/Python/lldbsuite/test/functionalities/param_entry_vals/basic_entry_values_x86_64/main.cpp:51:17:
error: FUNC1-DESC: expected string not found in input
 // FUNC1-DESC: name = "sink", type = "int &", location =
DW_OP_entry_value(DW_OP_reg5 RDI)
```

Perhaps the test needs to be re-written to check in a fixed assembly file, so
that DW_OP_entry_value evaluation can be tested in a way that's not dependent
on the compiler.

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