[llvm] r205188 - R600/SI: Implement SIInstrInfo::isTriviallyRematerializable()

[Tom Stellard]

Author: tstellar
Date: Mon Mar 31 09:01:56 2014
New Revision: 205188

URL: http://llvm.org/viewvc/llvm-project?rev=205188&view=rev
Log:
R600/SI: Implement SIInstrInfo::isTriviallyRematerializable()

Modified:
    llvm/trunk/lib/Target/R600/SIInstrInfo.cpp
    llvm/trunk/lib/Target/R600/SIInstrInfo.h

Modified: llvm/trunk/lib/Target/R600/SIInstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIInstrInfo.cpp?rev=205188&r1=205187&r2=205188&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIInstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/R600/SIInstrInfo.cpp Mon Mar 31 09:01:56 2014
@@ -308,6 +308,18 @@ SIInstrInfo::isSafeToMoveRegClassDefs(co
   return RC != &AMDGPU::EXECRegRegClass;
 }
 
+bool
+SIInstrInfo::isTriviallyReMaterializable(const MachineInstr *MI,
+                                         AliasAnalysis *AA) const {
+  switch(MI->getOpcode()) {
+  default: return AMDGPUInstrInfo::isTriviallyReMaterializable(MI, AA);
+  case AMDGPU::S_MOV_B32:
+  case AMDGPU::S_MOV_B64:
+  case AMDGPU::V_MOV_B32_e32:
+    return MI->getOperand(1).isImm();
+  }
+}
+
 namespace llvm {
 namespace AMDGPU {
 // Helper function generated by tablegen.  We are wrapping this with

Modified: llvm/trunk/lib/Target/R600/SIInstrInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIInstrInfo.h?rev=205188&r1=205187&r2=205188&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIInstrInfo.h (original)
+++ llvm/trunk/lib/Target/R600/SIInstrInfo.h Mon Mar 31 09:01:56 2014
@@ -77,6 +77,9 @@ public:
   virtual MachineInstr *commuteInstruction(MachineInstr *MI,
                                            bool NewMI=false) const;
 
+  bool isTriviallyReMaterializable(const MachineInstr *MI,
+                                   AliasAnalysis *AA = 0) const;
+
   virtual unsigned getIEQOpcode() const {
     llvm_unreachable("Unimplemented");
   }