[PATCH] D123493: Support the min of module flags when linking, use for AArch64 BTI/PAC-RET

[Daniel Kiss via Phabricator via llvm-commits]

danielkiss created this revision.
danielkiss added reviewers: pcc, chill, stuij, tejohnson.
Herald added subscribers: ormris, dexonsmith, steven_wu, hiraditya, kristof.beyls.
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danielkiss requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

LTO objects might compiled with different `mbranch-protection` flags which will cause an error in the linker.
Such a setup is allowed in the normal build with this change that is possible.


https://reviews.llvm.org/D123493

Files:
  clang/lib/CodeGen/CodeGenModule.cpp
  llvm/include/llvm/IR/Module.h
  llvm/lib/IR/Verifier.cpp
  llvm/lib/Linker/IRMover.cpp
  llvm/test/CodeGen/AArch64/debug-info-sve-dbg-declare.mir
  llvm/test/CodeGen/AArch64/live-debugvalues-sve.mir
  llvm/test/CodeGen/AArch64/memsize-remarks.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-0.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-1.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-2.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-3.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-4.ll
  llvm/test/CodeGen/AArch64/pacbti-llvm-generated-funcs-2.ll
  llvm/test/CodeGen/AArch64/pacbti-module-attrs.ll
  llvm/test/CodeGen/AArch64/setjmp-bti-no-enforcement.ll
  llvm/test/CodeGen/AArch64/setjmp-bti-outliner.ll
  llvm/test/CodeGen/AArch64/setjmp-bti.ll
  llvm/test/CodeGen/ARM/pacbti-module-attrs.ll
  llvm/test/CodeGen/ARM/setjmp-bti-basic.ll
  llvm/test/CodeGen/ARM/setjmp-bti-outliner.ll
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/skip-vpt-debug.mir
  llvm/test/CodeGen/Thumb2/bti-const-island-multiple-jump-tables.mir
  llvm/test/CodeGen/Thumb2/bti-const-island.mir
  llvm/test/CodeGen/Thumb2/bti-entry-blocks.ll
  llvm/test/CodeGen/Thumb2/bti-indirect-branches.ll
  llvm/test/CodeGen/Thumb2/bti-jump-table.mir
  llvm/test/CodeGen/Thumb2/bti-outliner-1.ll
  llvm/test/CodeGen/Thumb2/bti-outliner-2.ll
  llvm/test/CodeGen/Thumb2/bti-outliner-cost-1.ll
  llvm/test/CodeGen/Thumb2/bti-outliner-cost-2.ll
  llvm/test/CodeGen/Thumb2/bti-pac-replace-1.mir
  llvm/test/CodeGen/Thumb2/bti-pac-replace-2.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-basic.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-indirect-tail-call.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-outliner-1.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-outliner-2.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-outliner-3.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-outliner-4.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-outliner-5.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-overalign.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-unsupported-arch.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-varargs-1.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-varargs-2.ll
  llvm/test/CodeGen/Thumb2/pacbti-m-vla.ll
  llvm/test/DebugInfo/AArch64/debugline-endsequence.ll
  llvm/test/Instrumentation/InstrProfiling/debug-info-correlate-coverage.ll
  llvm/test/Instrumentation/InstrProfiling/debug-info-correlate.ll
  llvm/test/LTO/AArch64/Inputs/foo.ll
  llvm/test/LTO/AArch64/link-branch-target-enforcement.ll
  llvm/test/LTO/AArch64/lit.local.cfg

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