[llvm-bugs] Issue 3628 in oss-fuzz: llvm: Abrt in handleLLVMFatalError

jus… via monorail via llvm-bugs llvm-bugs at lists.llvm.org
Mon Oct 16 13:21:29 PDT 2017


Comment #2 on issue 3628 by jus... at justinbogner.com: llvm: Abrt in  
handleLLVMFatalError
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3628#c2

Looks like selection is failing to set a register class:

   LLVM ERROR: VReg has no regclass after selection (in function: f)

Converting the bitcode to LLVM IR we get:

source_filename = "M"

define void @f() {
BB:
   br label %BB1

BB1:                                              ; preds = %BB
   %G13 = getelementptr i16*, i16** undef, i1 false
   %A6 = alloca i1
   %A2 = alloca i1*
   %C1 = icmp ult i32 2147483647, 0
   store i1* %A6, i1** %A2
   store i1 %C1, i1* %A6
   store i16** %G13, i16*** undef
   ret void
}



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