misched: handle on-the-fly regpressure queries better for 2-addr

[oota-llvm.git] / include / llvm / CodeGen / MachineInstrBuilder.h

diff --git a/include/llvm/CodeGen/MachineInstrBuilder.h b/include/llvm/CodeGen/MachineInstrBuilder.h
index 9192474b952907098032b860b160e295f0fb3390..770685358aba4434a81d354cc1d8bcb69799b9ae 100644 (file)
--- a/include/llvm/CodeGen/MachineInstrBuilder.h
+++ b/include/llvm/CodeGen/MachineInstrBuilder.h
@@ -108,6 +108,12 @@ public:
     return *this;
   }
 
+  const MachineInstrBuilder &addTargetIndex(unsigned Idx, int64_t Offset = 0,
+                                          unsigned char TargetFlags = 0) const {
+    MI->addOperand(MachineOperand::CreateTargetIndex(Idx, Offset, TargetFlags));
+    return *this;
+  }
+
   const MachineInstrBuilder &addJumpTableIndex(unsigned Idx,
                                           unsigned char TargetFlags = 0) const {
     MI->addOperand(MachineOperand::CreateJTI(Idx, TargetFlags));
@@ -170,15 +176,24 @@ public:
   }
 
   // Add a displacement from an existing MachineOperand with an added offset.
-  const MachineInstrBuilder &addDisp(const MachineOperand &Disp,
-                                     int64_t off) const {
+  const MachineInstrBuilder &addDisp(const MachineOperand &Disp, int64_t off,
+                                     unsigned char TargetFlags = 0) const {
     switch (Disp.getType()) {
       default:
         llvm_unreachable("Unhandled operand type in addDisp()");
       case MachineOperand::MO_Immediate:
         return addImm(Disp.getImm() + off);
-      case MachineOperand::MO_GlobalAddress:
-        return addGlobalAddress(Disp.getGlobal(), Disp.getOffset() + off);
+      case MachineOperand::MO_GlobalAddress: {
+        // If caller specifies new TargetFlags then use it, otherwise the
+        // default behavior is to copy the target flags from the existing
+        // MachineOperand. This means if the caller wants to clear the
+        // target flags it needs to do so explicitly.
+        if (TargetFlags)
+          return addGlobalAddress(Disp.getGlobal(), Disp.getOffset() + off,
+                                  TargetFlags);
+        return addGlobalAddress(Disp.getGlobal(), Disp.getOffset() + off,
+                                Disp.getTargetFlags());
+      }
     }
   }
 };