[llvm-bugs] [Bug 26467] New: Assertion `Success && "failed to evaluate label difference as absolute"' failed.

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26467

            Bug ID: 26467
           Summary: Assertion `Success && "failed to evaluate label
                    difference as absolute"' failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: MC
          Assignee: unassignedbugs at nondot.org
          Reporter: peter at pcc.me.uk
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

$ cat gzread.i
a;
fn1() {
  if (a)
    fn2();
}

fn3() {
  do
    fn1();
  while (fn3);
}

fn4() {}
$ ~/src/llvm/ra/bin/clang "-cc1" "-triple" "x86_64-pc-windows-msvc18.0.0"
"-emit-obj" "-mincremental-linker-compatible" "-disable-free" "-main-file-name"
"gzread.i" "-mrelocation-model" "pic" "-pic-level" "2" "-mthread-model" "posix"
"-relaxed-aliasing" "-fmath-errno" "-masm-verbose" "-mconstructor-aliases"
"-munwind-tables" "-target-cpu" "x86-64" "-D_MT" "--dependent-lib=libcmt"
"--dependent-lib=oldnames" "-fno-rtti-data" "-gcodeview" "-fms-volatile"
"-fdiagnostics-format" "msvc" "-momit-leaf-frame-pointer" "-gcodeview"
"-dwarf-column-info" "-debug-info-kind=line-tables-only" "-debugger-tuning=gdb"
"-ffunction-sections" "-O2" "-Wno-unused-parameter"
"-Wno-deprecated-declarations" "-Wall" "-Werror" "-Wno-unused-parameter"
"-Wno-missing-field-initializers" "-Wno-microsoft-enum-value"
"-Wno-unknown-pragmas" "-Wno-microsoft-cast" "-Wheader-hygiene"
"-Wno-char-subscripts" "-Wno-unneeded-internal-declaration"
"-Wno-covered-switch-default" "-Wstring-conversion" "-Wno-c++11-narrowing"
"-Wno-deprecated-register" "-Wno-inconsistent-missing-override"
"-Wno-shift-negative-value" "-Wno-incompatible-pointer-types"
"-Wno-unused-variable" "-w" "-ferror-limit" "19" "-fmessage-length" "0"
"-fms-extensions" "-fms-compatibility" "-fms-compatibility-version=18.0"
"-fno-threadsafe-statics" "-fdelayed-template-parsing" "-fobjc-runtime=gcc"
"-fdiagnostics-show-option" "-vectorize-loops" "-vectorize-slp" "-o"
"gzread.obj" "-x" "cpp-output" "gzread.i" 
clang: ../lib/MC/MCCodeView.cpp:249: unsigned int
computeLabelDiff(llvm::MCAsmLayout &, const llvm::MCSymbol *, const
llvm::MCSymbol *): Assertion `Success && "failed to evaluate label difference
as absolute"' failed.

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