[llvm-bugs] [Bug 49013] New: opt crash with "-sroa -jump-threading -lcssa -licm": LLVM ERROR: Broken function found, compilation aborted!

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49013

            Bug ID: 49013
           Summary: opt crash with "-sroa -jump-threading -lcssa -licm":
                    LLVM ERROR: Broken function found, compilation
                    aborted!
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: suochenyao at 163.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Created attachment 24476
  --> https://bugs.llvm.org/attachment.cgi?id=24476&action=edit
IR that is passed to opt

*******************************************************************************
OS and Platform:
CentOS Linux release 7.8.2003 (Core), x86_64 GNU/Linux
*******************************************************************************
Program:
short a;
long b;
int c;
void d() {
e:
  for (;;) {
    long f = 1;
    if (~f) {
      int g, h, j;
      int i[8] = {4};
      int *k[7][5] = {&h, &j, &g};
      long l[5];
      for (; 5;)
        l[c];
      for (; b;)
        for (; a; a)
          goto e;
    }
  }
}
int main() {}
*******************************************************************************
clang version:
clang version 10.0.0 (/home/suocy/src/llvm-dev/llvm/tools/clang
65acf43270ea2894dffa0d0b292b92402f80c8cb) (/home/suocy/src/llvm-dev/llvm
2c4ca6832fa6b306ee6a7010bfb80a3f2596f824)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/suocy/bin/llvm-dev/bin
Found candidate GCC installation:
/opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.5
Selected GCC installation:
/opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
*******************************************************************************
Command Lines:
$ clang -O3 -mllvm -disable-llvm-optzns -c -emit-llvm a.c -o a.bc
a.c:14:12: warning: expression result unused [-Wunused-value]
        l[c];
        ~ ~^
a.c:16:19: warning: expression result unused [-Wunused-value]
        for (; a; a)
                  ^
2 warnings generated.
$ opt -sroa -jump-threading -lcssa -licm a.bc -o a.opt.bc
PHI nodes must have at least one entry.  If the block is dead, the PHI should
be removed!
  %k.sroa.0.3 = phi i32*
in function d
LLVM ERROR: Broken function found, compilation aborted!

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