294ff667fed921fd8f31e985cf5537df16c141a6 - platform_external_llvm

commit	294ff667fed921fd8f31e985cf5537df16c141a6	[log] [tgz]
author	Matthias Braun <matze@braunis.de>	Thu Jun 28 17:00:45 2018 +0000
committer	Matthias Braun <matze@braunis.de>	Thu Jun 28 17:00:45 2018 +0000
tree	3a27e6da3bfca5324ad342865e5de11b82e8af3a
parent	bd0a2a58e5b5049d8395d429f250e5ead9644441 [diff]

SelectionDAGBuilder, mach-o: Skip trap after noreturn call (for Mach-O)

Add NoTrapAfterNoreturn target option which skips emission of traps
behind noreturn calls even if TrapUnreachable is enabled.

Enable the feature on Mach-O to save code size; Comments suggest it is
not possible to enable it for the other users of TrapUnreachable.

rdar://41530228

DifferentialRevision: https://reviews.llvm.org/D48674

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335877 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/TargetOptions.h[diff]
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp[diff]
lib/Target/AArch64/AArch64TargetMachine.cpp[diff]
lib/Target/ARM/ARMTargetMachine.cpp[diff]
lib/Target/X86/X86TargetMachine.cpp[diff]
test/CodeGen/X86/shadow-stack.ll[diff]
test/CodeGen/X86/unreachable-trap.ll[Added - diff]

7 files changed

tree: 3a27e6da3bfca5324ad342865e5de11b82e8af3a