[llvm] r178972 - PPC pre-increment load instructions do not have side effects

[Hal Finkel]

Author: hfinkel
Date: Sun Apr  7 00:46:58 2013
New Revision: 178972

URL: http://llvm.org/viewvc/llvm-project?rev=178972&view=rev
Log:
PPC pre-increment load instructions do not have side effects

Modified:
    llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td
    llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td

Modified: llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td?rev=178972&r1=178971&r2=178972&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td Sun Apr  7 00:46:58 2013
@@ -594,7 +594,7 @@ def LWZX8 : XForm_1<31,  23, (outs G8RC:
                    
                    
 // Update forms.
-let mayLoad = 1 in {
+let mayLoad = 1, neverHasSideEffects = 1 in {
 def LBZU8 : DForm_1<35, (outs G8RC:$rD, ptr_rc_nor0:$ea_result), (ins memri:$addr),
                     "lbzu $rD, $addr", LdStLoadUpd,
                     []>, RegConstraint<"$addr.reg = $ea_result">,
@@ -666,7 +666,7 @@ def LDBRX : XForm_1<31,  532, (outs G8RC
                    "ldbrx $rD, $src", LdStLoad,
                    [(set i64:$rD, (PPClbrx xoaddr:$src, i64))]>, isPPC64;
 
-let mayLoad = 1 in
+let mayLoad = 1, neverHasSideEffects = 1 in
 def LDU  : DSForm_1<58, 1, (outs G8RC:$rD, ptr_rc_nor0:$ea_result), (ins memrix:$addr),
                     "ldu $rD, $addr", LdStLDU,
                     []>, RegConstraint<"$addr.reg = $ea_result">, isPPC64,

Modified: llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td?rev=178972&r1=178971&r2=178972&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td Sun Apr  7 00:46:58 2013
@@ -757,7 +757,7 @@ def LFD : DForm_1<50, (outs F8RC:$rD), (
 
 
 // Unindexed (r+i) Loads with Update (preinc).
-let mayLoad = 1 in {
+let mayLoad = 1, neverHasSideEffects = 1 in {
 def LBZU : DForm_1<35, (outs GPRC:$rD, ptr_rc_nor0:$ea_result), (ins memri:$addr),
                    "lbzu $rD, $addr", LdStLoadUpd,
                    []>, RegConstraint<"$addr.reg = $ea_result">,