[llvm-bugs] [Bug 34941] New: Infinite loop if function name equals intrinsic used in it

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Fri Oct 13 15:48:02 PDT 2017


            Bug ID: 34941
           Summary: Infinite loop if function name equals intrinsic used
                    in it
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: MCJIT
          Assignee: unassignedbugs at nondot.org
          Reporter: lepesme.jb at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 19271
  --> https://bugs.llvm.org/attachment.cgi?id=19271&action=edit
Demo illustrating the problem


I seem to get an infinite loop with simple function calling a f64 intrinsic.
I reproduced the problem with lli/llc with the following snippet:

declare double @llvm.floor.f64(double) #0
define double @floor(double) {
  %tmp = call double @llvm.floor.f64(double %0)
  ret double %tmp
define void @main() {
  call double @floor(double 0.0)
  ret void
attributes #0 = { nounwind readnone speculatable }

Changing the name of @floor, or switching to f32 seem to resolve the problem.
Using revision 315749.

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