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Robin Morisset 6dbbbc28b0 [X86] Make wide loads be managed by AtomicExpand 
Summary:
AtomicExpand already had logic for expanding wide loads and stores on LL/SC
architectures, and for expanding wide stores on CmpXchg architectures, but
not for wide loads on CmpXchg architectures. This patch fills this hole,
and makes use of this new feature in the X86 backend.

Only one functionnal change: we now lose the SynchScope attribute.
It is regrettable, but I have another patch that I will submit soon that will
solve this for all of AtomicExpand (it seemed better to split it apart as it
is a different concern).

Test Plan: make check-all (lots of tests for this functionality already exist)

Reviewers: jfb

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5404

llvm-svn: 218332
 		2014-09-23 20:59:25 +00:00
..
AArch64 [FastISel][AArch64] Also allow folding of sign-/zero-extend and shift-left for booleans (i1). 2014-09-22 21:08:53 +00:00
ARM [ARM] Do not perform a tail call when the caller returns several values. 2014-09-18 21:17:50 +00:00
CPP IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
Generic Fix crash with an insertvalue that produces an empty object. 2014-09-20 00:10:47 +00:00
Hexagon DebugInfo: Assert that any CU for which debug_loc lists are emitted, has at least one range. 2014-08-06 00:21:25 +00:00
Inputs
…
MSP430 Drop the W postfix on the 16-bit registers. 2014-09-10 06:58:14 +00:00
Mips Add mips32 r1 to the list of supported targets for Mips fast-isel 2014-09-15 20:30:25 +00:00
NVPTX [MachineSink] Use the real post dominator tree 2014-09-01 03:47:25 +00:00
PowerPC [Power] Use AtomicExpandPass for fence insertion, and use lwsync where appropriate 2014-09-23 20:46:49 +00:00
R600 Revert "R600/SI: Add support for global atomic add" 2014-09-22 16:44:04 +00:00
SPARC Add back tests for empty function in SPARC and PowerPC. 2014-09-15 22:11:07 +00:00
SystemZ IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
Thumb Check-label a bit more specific 2014-09-03 13:32:08 +00:00
Thumb2 ARM / x86_64 varargs: Don't save regparms in prologue without va_start 2014-08-22 21:59:26 +00:00
X86 [X86] Make wide loads be managed by AtomicExpand 2014-09-23 20:59:25 +00:00
XCore llvm/test/CodeGen/XCore/dwarf_debug.ll: Fix not to be affected by *-win32. 2014-07-04 11:58:03 +00:00