[llvm-bugs] [Bug 41571] New: [5/6/7/8 Regression] Multiple returns are produced where previously was only one

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41571

            Bug ID: 41571
           Summary: [5/6/7/8 Regression] Multiple returns are produced
                    where previously was only one
           Product: new-bugs
           Version: 5.0
          Hardware: PC
                OS: All
            Status: NEW
          Keywords: code-quality
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: nok.raven at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

bool foo(int x)
{
    if (x == 123 || x == 456)
        return true;
    return false;
}

Since 5.0:
        mov     al, 1
        cmp     edi, 123
        je      .LBB0_3
        cmp     edi, 456
        jne     .LBB0_2
.LBB0_3:
        ret
.LBB0_2:
        xor     eax, eax
        ret

Before 5.0:
        mov     al, 1
        cmp     edi, 123
        je      .LBB0_3
        cmp     edi, 456
        je      .LBB0_3
        xor     eax, eax
.LBB0_3:
        ret

https://godbolt.org/z/RW_dag

The same happened to x86 and ARM64.

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