[PATCH] D99735: [MIPatternMatch]: Add mi_match for MachineInstr

[Petar Avramovic via Phabricator via llvm-commits]

Petar.Avramovic created this revision.
Petar.Avramovic added reviewers: foad, arsenm.
Petar.Avramovic requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

This utility allows more efficient start of pattern match.
Often MachineInstr(MI) is available and instead of using
mi_match(MI.getOperand(0).getReg(), MRI, ...) followed by
MRI.getVRegDef(Reg) that gives back MI we now use
mi_match(MI, MRI, ...).


https://reviews.llvm.org/D99735

Files:
  llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h


Index: llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
===================================================================
--- llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
+++ llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
@@ -24,6 +24,11 @@
   return P.match(MRI, R);
 }
 
+template <typename Pattern>
+bool mi_match(MachineInstr &MI, const MachineRegisterInfo &MRI, Pattern &&P) {
+  return P.match(MRI, &MI);
+}
+
 // TODO: Extend for N use.
 template <typename SubPatternT> struct OneUse_match {
   SubPatternT SubPat;
@@ -181,6 +186,13 @@
       return true;
     return false;
   }
+  static bool bind(const MachineRegisterInfo &MRI, MachineInstr *&MI,
+                   MachineInstr *Inst) {
+    MI = Inst;
+    if (MI)
+      return true;
+    return false;
+  }
 };
 
 template <> struct bind_helper<LLT> {


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