[LLVMbugs] [Bug 19638] New: [ARM64] fatal error: error in backend: Cannot select: 0x7d713c0: f64 = ConstantFP<-0.000000e+00>

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19638

            Bug ID: 19638
           Summary: [ARM64] fatal error: error in backend: Cannot select:
                    0x7d713c0: f64 = ConstantFP<-0.000000e+00>
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: AArch64
          Assignee: unassignedbugs at nondot.org
          Reporter: mcrosier at codeaurora.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Reduced test case:

target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
target triple = "arm64-none-linux-gnu"

define double @test(double %a, double %b) {
entry:
  %mul = fmul double %a, 0.000000e+00
  %mul1 = fmul double %b, 0.000000e+00
  %sub = fsub double %mul, %mul1
  ret double %sub
}

Reproduce with:
llc -O3 -fp-contract=fast test.ll

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