[llvm-bugs] [Bug 39256] New: [X86] X86ISelDAGToDAG - unsupported store size

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39256

            Bug ID: 39256
           Summary: [X86] X86ISelDAGToDAG - unsupported store size
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: llvm-dev at redking.me.uk
                CC: craig.topper at gmail.com, llvm-bugs at lists.llvm.org

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10895

; ModuleID =
'clusterfuzz-testcase-minimized-llvm-isel-fuzzer--x86_64-O2-5656232589787136'
source_filename = "llvm/test/Transforms/InstCombine/loadstore-metadata.ll"
target datalayout = "e-m:e-p:64:64:64-i64:64-f80:128-n8:16:32:64-S128"

define i32 @test_load_cast_combine_nontemporal(float* %ptr) {
entry:
  %l = load float, float* %ptr, !nontemporal !0
  %C = fcmp ult float %l, 0x36A0000000000000
  store i1 %C, i1* undef
  ret i32 -2147483648
}

!0 = !{i32 1}
!1 = !{!"scalar type", !2}
!2 = !{!"root"}

llc

Unsupported store size
UNREACHABLE executed at
/home/simon/LLVM/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:443!

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