[llvm-bugs] [Bug 27246] New: r261346 causes this test case to fail

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27246

            Bug ID: 27246
           Summary: r261346 causes this test case to fail
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Loop Optimizer
          Assignee: unassignedbugs at nondot.org
          Reporter: kevin.b.smith at intel.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Starting with r261346 the following test case will fail when compiled
with clang/llvm for intel64 linux.

cat >t1.cpp <<EOF
#include <stdio.h>

int main ()
{
    unsigned int i = 4;
    unsigned int k = 17;
    unsigned int n = 60;
    unsigned int e = 0;

    for (i = 1; i < 49; i++)
    {
        for (k = i; k > 1; --k) {
          e = k;
        }
        n = e;
    }

    if (n == 2)
        printf("Passed\n");
    else
        printf("Failed\n");
    return 0;
}
EOF

Compile using
clang -c -O2 t1.cpp
clang -o t1.exe t1.c

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