[llvm-bugs] [Bug 40960] New: Merge r355227 and r355228 to 8.0

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Mar 4 13:54:51 PST 2019


https://bugs.llvm.org/show_bug.cgi?id=40960

            Bug ID: 40960
           Summary: Merge r355227 and r355228 to 8.0
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: craig.topper at gmail.com
                CC: craig.topper at gmail.com, llvm-bugs at lists.llvm.org,
                    llvm-dev at redking.me.uk, spatel+llvm at rotateright.com

Hans, is it possible to merge this to 8.0. I know we're getting pretty late.

ISPC folks tell me they are seeing a regression on some test cases with 8.0
that these commits fix.

The gather/scatter intrinsics have been misdeclared for a long time probably
since they were added years ago. My reduced test case fails on previous
versions llvm.

So I think that means that ISPC is hitting some other optimization change that
made them more susceptible to this issue.

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