[llvm-bugs] [Bug 26822] New: [seh] Jump out of finally causes verifier error

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Mar 2 15:04:06 PST 2016


https://llvm.org/bugs/show_bug.cgi?id=26822

            Bug ID: 26822
           Summary: [seh] Jump out of finally causes verifier error
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: david.majnemer at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

consider:
void f() {
  __try {
  } __finally {
    goto lbl;
  }
lbl:;
}
$ clang -cc1 -triple x86_64-pc-windows-msvc18.0.0 -fms-extensions -x c t.c
-emit-llvm-only
t.c:4:5: warning: jump out of __finally block has undefined behavior
    goto lbl;
    ^
Referring to a basic block in another function!
  br label %lbl
fatal error: error in backend: Broken function found, compilation aborted!

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