granicus.if.org Git - clang/commit

author	Tim Northover <tnorthover@apple.com>
	Wed, 9 Jul 2014 09:24:43 +0000 (09:24 +0000)
committer	Tim Northover <tnorthover@apple.com>
	Wed, 9 Jul 2014 09:24:43 +0000 (09:24 +0000)
commit	e25cedce46ef7521f6dd62c437d5798631aed617
tree	e6861ce668e640229c40a508fed11118825b10b2	tree \| snapshot
parent	bdfb53808762019d0f56302ec24a033d4982f7ce	commit \| diff

ARM: use LLVM's atomicrmw instructions when ldrex/strex are available.

Having some kind of weird kernel-assisted ABI for these when the
native instructions are available appears to be (and should be) the
exception; OSs have been gradually opting in for years and the code
was getting silly.

So let LLVM decide whether it's possible/profitable to inline them by
default.

Patch by Phoebe Buckheister.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212598 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Basic/Targets.cpp		diff \| blob \| history
test/CodeGen/arm-atomics-m.c	[new file with mode: 0644]	blob
test/CodeGen/arm-atomics-m0.c	[new file with mode: 0644]	blob
test/CodeGen/arm-atomics.c	[new file with mode: 0644]	blob