llc crashes with "UNREACHABLE executed" message

[llvmbot]

Bugzilla Link	13897
Resolution	FIXED
Resolved on	Mar 22, 2019 10:54
Version	3.1
OS	Windows XP
Reporter	LLVM Bugzilla Contributor
CC	@isanbard,@RKSimon,@slacka,@seanm

Extended Description

i have a simple IR file like below:

;;;;;;;;;;;;;
; ModuleID = 'gg.bc'
@​aaa = external global i128
@​bbb = external global i128

define void @​depasta() nounwind {
"0x0":
%0 = load i128* @​bbb
%1 = and i128 %0, 4294967295
%2 = shl i128 %0, 96
%3 = mul i128 %1, 18446744078004518913
%4 = add i128 %3, %2
store i128 %4, i128* @​aaa
ret void
}
;;;;;;;;;

i tried to compile this IR file to bitcode file (with llvm-as), then
compile BC file to native code (with llc).
however, llc crashes like below:

---

C:>llvm-as gg.ll
C:>llc -filetype=obj gg.bc
UNREACHABLE executed!

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

this looks like a bug, doesn't it? any idea why?

this is LLVM 3.1, on Windows 32bit.

[llvmbot]

Duncan Sands reported on mailing list:

....
I can reproduce this with "llc -mtriple=i386-linux-gnu", the crash being

Call result #​3 has unhandled type i32
UNREACHABLE executed at /home/duncan/LLVM/llvm/lib/CodeGen/CallingConvLower.cpp:165!
...
llvm::CCState::AnalyzeCallResult(llvm::SmallVectorImplllvm::ISD::InputArg const&, bool (*)(unsigned int, llvm::MVT, llvm::MVT, llvm::CCValAssign::LocInfo, llvm::ISD::ArgFlagsTy, llvm::CCState&)) + 284
...

[llvmbot]

I think the basic problem is that 128 bit multiplication is not supported on 32
bit machines because it needs to be turned into a call to a library function (in
libgcc or compiler-rt) and no such library function exists.

[llvmbot]

rdar://12409066

[isanbard]

What is the status of this bug? I need to know if it's a real "release blocker" or not. :)

[llvmbot]

*** Bug #8751 has been marked as a duplicate of this bug. ***

[llvmbot]

*** Bug llvm/llvm-bugzilla-archive#14469 has been marked as a duplicate of this bug. ***

[RKSimon]

This was fixed years ago - added a test case at rL356786

[llvmbot]

mentioned in issue llvm/llvm-bugzilla-archive#14469

[llvmbot]

mentioned in issue #8751