[llvm-bugs] [Bug 25577] New: following r253240, clang does not finish compiling this example

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=25577

            Bug ID: 25577
           Summary: following r253240, clang does not finish compiling
                    this example
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: yaron.keren at gmail.com
                CC: llvm-bugs at lists.llvm.org, resistor at mac.com,
                    tzafrir11 at gmail.com
    Classification: Unclassified

http://llvm.org/viewvc/llvm-project?view=revision&revision=253240
Compile this code:



float __attribute__((__vector_size__(8))) add(float
__attribute__((__vector_size__(8))));
float __attribute__((__vector_size__(8))) mul();
void foo() {
  float __attribute__((__vector_size__(8))) v1 = mul();
  add(-v1 - v1);
}



with:

clang -c -O2 -ffast-math n1fv_7.c

r253239 finishes OK
r253240 does not finish

The sample was reduced from the fftw source file dft/simd/sse2/n1fv_7.c.

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