Assertion failed: (MBB && MBB->getNumber() >= 0 && "Invalid basic block")

[pwo]

Bugzilla Link	10998
Resolution	FIXED
Resolved on	Nov 07, 2018 00:17
Version	trunk
OS	All
Attachments	bugpoint-reduced-simplified.bc, bugpoint-reduced-function.bc
CC	@efriedma-quic,@stoklund

Extended Description

clang version 3.0 (trunk 140372)
Target: i386-unknown-freebsd8.2

Original source is CGBuiltin.cpp from clang r135360. This only happens on i386, amd64 is ok.

% llc bugpoint-reduced-simplified.bc
Assertion failed: (MBB && MBB->getNumber() >= 0 && "Invalid basic block"), function EmitJumpTableEntry, file /data/buildslave/freebsd-clang-i386/src-llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp, line 1108.
Stack dump:
0. Program arguments: /data/buildslave/freebsd-clang-i386/obj/llvm.2/Release+Asserts/bin/llc bugpoint-reduced-simplified.bc

1. Running pass 'Function Pass Manager' on module 'bugpoint-reduced-simplified.bc'.
2. Running pass 'X86 AT&T-Style Assembly Printer' on function '@_ZN5clang7CodeGen15CodeGenFunction18EmitARMBuiltinExprEjPKNS_8CallExprE'
   Abort (core dumped)

[efriedma-quic]

Reduced testcase
Reproduces with just "llc". It looks like something is going wrong in TwoAddressInstructionPass.

[efriedma-quic]

r140428.