[all-commits] [llvm/llvm-project] 2c63e8: [AArch64] Fix a bug with jump table generation

[Cullen Rhodes via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 2c63e8e36df071e62feb7ac9c948d6fdd54e0c35
      https://github.com/llvm/llvm-project/commit/2c63e8e36df071e62feb7ac9c948d6fdd54e0c35
  Author: Cullen Rhodes <cullen.rhodes at arm.com>
  Date:   2019-12-06 (Fri, 06 Dec 2019)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64CompressJumpTables.cpp
    M llvm/lib/Target/AArch64/MCTargetDesc/AArch64AsmBackend.cpp
    A llvm/test/CodeGen/AArch64/jti-correct-datatype.mir

  Log Message:
  -----------
  [AArch64] Fix a bug with jump table generation

Summary:
When trying to calculate the offsets for the jump table entries
we fail to take into account the block alignment, which could be
greater than 4 bytes. This led to cases where the jump table
offset was too big to fit in a byte.

Reviewers: t.p.northover, sdesmalen, ostannard

Reviewed By: ostannard

Subscribers: ostannard, kristof.beyls, hiraditya, llvm-commits

Committed on behalf of David Sherwood (david-arm)

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70533