replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

ARMv8: SWP and SWPB are obsoleted on ARMv8. 

llvm-svn: 188288
This commit is contained in:
Joey Gouly 2013-08-13 16:40:47 +00:00
parent f59b1a9211
commit 9960e764aa
2 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
llvm/lib/Target/ARM/ARMInstrInfo.td
View File

@ -196,6 +196,8 @@ def HasV7 : Predicate<"Subtarget->hasV7Ops()">,
AssemblerPredicate<"HasV7Ops", "armv7">;
def HasV8 : Predicate<"Subtarget->hasV8Ops()">,
AssemblerPredicate<"HasV8Ops", "armv8">;
def PreV8 : Predicate<"!Subtarget->hasV8Ops()">,
AssemblerPredicate<"!HasV8Ops", "armv7 or earlier">;
def NoVFP : Predicate<"!Subtarget->hasVFP2()">;
def HasVFP2 : Predicate<"Subtarget->hasVFP2()">,
AssemblerPredicate<"FeatureVFP2", "VFP2">;
@ -4455,9 +4457,11 @@ def : ARMPat<(strex_2 (and GPR:$Rt, 0xffff), addr_offset_none:$addr),
// SWP/SWPB are deprecated in V6/V7.
let mayLoad = 1, mayStore = 1 in {
def SWP : AIswp<0, (outs GPRnopc:$Rt),
(ins GPRnopc:$Rt2, addr_offset_none:$addr), "swp", []>;
(ins GPRnopc:$Rt2, addr_offset_none:$addr), "swp", []>,
Requires<[PreV8]>;
def SWPB: AIswp<1, (outs GPRnopc:$Rt),
(ins GPRnopc:$Rt2, addr_offset_none:$addr), "swpb", []>;
(ins GPRnopc:$Rt2, addr_offset_none:$addr), "swpb", []>,
Requires<[PreV8]>;
}
//===----------------------------------------------------------------------===//

7
llvm/test/MC/ARM/obsolete-v8.s Normal file
View File

@ -0,0 +1,7 @@
@ RUN: not llvm-mc -triple=armv8 < %s 2>&1 | FileCheck %s
swp r0, r1, [r2]
@ CHECK: instruction requires: armv7 or earlier
swpb r0, r1, [r2]
@ CHECK: instruction requires: armv7 or earlier