Add an analyzePhysReg() function to MachineOperandIteratorBase that analyses an instruction's use of a physical register, analogous to analyzeVirtReg.

Rename RegInfo to VirtRegInfo so as not to be confused with the new PhysRegInfo.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163694 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 37 insertions, 3 deletions

diff --git a/include/llvm/CodeGen/MachineInstrBundle.h b/include/llvm/CodeGen/MachineInstrBundle.h
index dc5f9a6ec8..854ba06209 100644
--- a/include/llvm/CodeGen/MachineInstrBundle.h
+++ b/include/llvm/CodeGen/MachineInstrBundle.h
@@ -130,9 +130,9 @@ public:
     return OpI - InstrI->operands_begin();
   }
 
-  /// RegInfo - Information about a virtual register used by a set of operands.
+  /// VirtRegInfo - Information about a virtual register used by a set of operands.
   ///
-  struct RegInfo {
+  struct VirtRegInfo {
     /// Reads - One of the operands read the virtual register.  This does not
     /// include <undef> or <internal> use operands, see MO::readsReg().
     bool Reads;
@@ -146,6 +146,32 @@ public:
     bool Tied;
   };
 
+  /// PhysRegInfo - Information about a physical register used by a set of
+  /// operands.
+  struct PhysRegInfo {
+    /// Clobbers - Reg or an overlapping register is defined, or a regmask 
+    /// clobbers Reg.
+    bool Clobbers;
+
+    /// Defines - Reg or a super-register is defined.
+    bool Defines;
+
+    /// DefinesOverlap - Reg or an overlapping register is defined.
+    bool DefinesOverlap;
+
+    /// Reads - Read or a super-register is read.
+    bool Reads;
+
+    /// ReadsOverlap - Reg or an overlapping register is read.
+    bool ReadsOverlap;
+
+    /// DefinesDead - All defs of a Reg or a super-register are dead.
+    bool DefinesDead;
+
+    /// There is a kill of Reg or a super-register.
+    bool Kills;
+  };
+
   /// analyzeVirtReg - Analyze how the current instruction or bundle uses a
   /// virtual register.  This function should not be called after operator++(),
   /// it expects a fresh iterator.
@@ -154,8 +180,16 @@ public:
   /// @param Ops When set, this vector will receive an (MI, OpNum) entry for
   ///            each operand referring to Reg.
   /// @returns A filled-in RegInfo struct.
-  RegInfo analyzeVirtReg(unsigned Reg,
+  VirtRegInfo analyzeVirtReg(unsigned Reg,
                  SmallVectorImpl<std::pair<MachineInstr*, unsigned> > *Ops = 0);
+
+  /// analyzePhysReg - Analyze how the current instruction or bundle uses a
+  /// physical register.  This function should not be called after operator++(),
+  /// it expects a fresh iterator.
+  ///
+  /// @param Reg The physical register to analyze.
+  /// @returns A filled-in PhysRegInfo struct.
+  PhysRegInfo analyzePhysReg(unsigned Reg, const TargetRegisterInfo *TRI);
 };
 
 /// MIOperands - Iterate over operands of a single instruction.