[llvm-bugs] [Bug 40451] New: crash mixing funny x86 sse flags

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Jan 24 15:55:39 PST 2019


            Bug ID: 40451
           Summary: crash mixing funny x86 sse flags
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Driver
          Assignee: unassignedclangbugs at nondot.org
          Reporter: ndesaulniers at google.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk


// clang -c -O2 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -m64 -msse float.c
double div (double a, double b) {                                               
  return b / a;                                                                 

float.c:1:8: error: SSE2 register return with SSE2 disabled
double div (double a, double b) {
3.      Running pass 'Function Pass Manager' on module 'float.c'.
4.      Running pass 'X86 FP Stackifier' on function '@div'

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