[llvm-bugs] [Bug 25416] New: clang hangs when compile a large c file.

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=25416

            Bug ID: 25416
           Summary: clang hangs when compile a large c file.
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: yunlian at google.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

We have a c file like this
It contains a jmp statement for every 4K nop. There are over
4M instructions in the asm. gcc compile it within one second.
Clang hangs.
The command line is
 clang iTLB_benchmark_function.c -c -o iTLB_benchmark_function.o


void iTLB_bechmark_function() {
  __asm__ (
    "1:jmp 1f\n\t"
    "nop\n\t"
    "nop\n\t"
       .
       .
       .
    "1:nop\n\t"
  );
}

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