https://llvm.org/bugs/show_bug.cgi?id=26630
Bug ID: 26630
Summary: [Hexagon] J2_jump instruction with a global address
fails with: Assertion `isMBB() && "Wrong
MachineOperand accessor"'
Product: tools
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: llc
Assignee: unassignedb...@nondot.org
Reporter: r...@sics.se
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 15909
--> https://llvm.org/bugs/attachment.cgi?id=15909&action=edit
ZIP file with a test case to reproduce the failure and a tentative patch
llc fails when facing J2_jump instructions that do not refer to a basic block
but to a global address, such as:
J2_jump <ga:@putAC>
This yields to a failed assertion of the type `isMBB() && "Wrong MachineOperand
accessor"' triggered from HexagonInstrInfo.cpp and HexagonNewValueJump.cpp.
The failure can be reproduced by running llc on the attached LLVM IR function:
$ llc bugpoint-reduced-simplified.ll -march=hexagon -mcpu=hexagonv4
I also attach a small patch that fixes the issue (although it might not do it
in the best way).
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