[llvm-commits] [llvm] r91555 - in /llvm/trunk/lib/Target/ARM: ARMInstrInfo.td ARMInstrThumb2.td

[Jim Grosbach]

Author: grosbach
Date: Wed Dec 16 13:44:06 2009
New Revision: 91555

URL: http://llvm.org/viewvc/llvm-project?rev=91555&view=rev
Log:
Mark STREX* as earlyclobber for the success result register.

Modified:
    llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
    llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td

Modified: llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrInfo.td?rev=91555&r1=91554&r2=91555&view=diff

==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrInfo.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrInfo.td Wed Dec 16 13:44:06 2009
@@ -1740,7 +1740,7 @@
                     []>;
 }
 
-let mayStore = 1 in {
+let mayStore = 1, Constraints = "@earlyclobber $success" in {
 def STREXB : AIstrex<0b10, (outs GPR:$success), (ins GPR:$src, GPR:$ptr),
                     NoItinerary,
                     "strexb", "\t$success, $src, [$ptr]",

Modified: llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td?rev=91555&r1=91554&r2=91555&view=diff

==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td Wed Dec 16 13:44:06 2009
@@ -1752,7 +1752,7 @@
                          [], {?, ?, ?, ?}>;
 }
 
-let mayStore = 1 in {
+let mayStore = 1, Constraints = "@earlyclobber $success" in {
 def t2STREXB : T2I_strex<0b00, (outs GPR:$success), (ins GPR:$src, GPR:$ptr),
                          AddrModeNone, Size4Bytes, NoItinerary,
                          "strexb", "\t$success, $src, [$ptr]", "", []>;