[LLVMbugs] [Bug 4297] New: llc: Assertion `castIsValid(getOpcode(), S, Ty) && " Illegal PtrToInt"' failed.

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4297

           Summary: llc: Assertion `castIsValid(getOpcode(), S, Ty) &&
                    "Illegal PtrToInt"' failed.
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: fvbommel at wxs.nl
                CC: llvmbugs at cs.uiuc.edu


I'm getting an assertion failure from llc that doesn't seem to be caused by any
instruction in my code (it complains about ptrtoint, which isn't in there).

This is the assertion:

$ llc bugpoint-reduced-simplified.bc 
llc: Instructions.cpp:2463: llvm::PtrToIntInst::PtrToIntInst(llvm::Value*,
const llvm::Type*, const std::string&, llvm::Instruction*): Assertion
`castIsValid(getOpcode(), S, Ty) && "Illegal PtrToInt"' failed.
0   llc             0x0000000000d63cdf
1   llc             0x0000000000d640e9
2   libpthread.so.0 0x00007f5bba7700f0
3   libc.so.6       0x00007f5bb986c015 gsignal + 53
4   libc.so.6       0x00007f5bb986db83 abort + 387
5   libc.so.6       0x00007f5bb9864d89 __assert_fail + 233
6   llc             0x0000000000ce38e8
7   llc             0x0000000000be83ce
8   llc             0x0000000000beb728
9   llc             0x0000000000cfd109
llvm::FPPassManager::runOnFunction(llvm::Function&) + 489
10  llc             0x0000000000cfdb26
llvm::FunctionPassManagerImpl::run(llvm::Function&) + 166
11  llc             0x0000000000cfdd6b
llvm::FunctionPassManager::run(llvm::Function&) + 75
12  llc             0x0000000000516c09 main + 4649
13  libc.so.6       0x00007f5bb9857466 __libc_start_main + 230
14  llc             0x0000000000514df9
Stack dump:
0.      Program arguments: llc bugpoint-reduced-simplified.bc 
1.      Running pass 'Optimize for code generation' on function '@_Dmain'
Aborted


And this is the code:

$ llvm-dis <bugpoint-reduced-simplified.bc 
; ModuleID = '<stdin>'
target datalayout =
"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-unknown-linux-gnu"
        %"byte[]" = type { i64, i8* }
        %"char[][]" = type { i64, %"byte[]"* }
@.str = external constant [7 x i8]              ; <[7 x i8]*> [#uses=1]

define fastcc i32 @_Dmain(%"char[][]" %unnamed) {
entry:
        %tmp = getelementptr [7 x i8]* @.str, i32 0, i32 0              ; <i8*>
[#uses=1]
        br i1 undef, label %foreachbody, label %foreachend

foreachbody:            ; preds = %entry
        %tmp4 = getelementptr i8* %tmp, i32 undef               ; <i8*>
[#uses=1]
        %tmp5 = load i8* %tmp4          ; <i8> [#uses=0]
        unreachable

foreachend:             ; preds = %entry
        ret i32 0
}


(I'm using r72443, if that matters)


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