[PATCH] D120122: [StableHashing] Hash machine basic blocks and functions

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
foad added reviewers: plotfi, kyulee, lanza, paquette, manmanren, arsenm, serge-sans-paille.
Herald added a subscriber: hiraditya.
foad requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

This adds very basic support for hashing MachineBasicBlock
and MachineFunction, for use in MachineFunctionPass to
detect passes that modify the MachineFunction wrongly.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D120122

Files:
  llvm/include/llvm/CodeGen/MachineStableHash.h
  llvm/lib/CodeGen/MachineStableHash.cpp


Index: llvm/lib/CodeGen/MachineStableHash.cpp
===================================================================
--- llvm/lib/CodeGen/MachineStableHash.cpp
+++ llvm/lib/CodeGen/MachineStableHash.cpp
@@ -195,3 +195,19 @@
   return stable_hash_combine_range(HashComponents.begin(),
                                    HashComponents.end());
 }
+
+stable_hash llvm::stableHashValue(const MachineBasicBlock &MBB) {
+  SmallVector<stable_hash> HashComponents;
+  for (auto &MI : MBB)
+    HashComponents.push_back(stableHashValue(MI));
+  return stable_hash_combine_range(HashComponents.begin(),
+                                   HashComponents.end());
+}
+
+stable_hash llvm::stableHashValue(const MachineFunction &MF) {
+  SmallVector<stable_hash> HashComponents;
+  for (auto &MBB : MF)
+    HashComponents.push_back(stableHashValue(MBB));
+  return stable_hash_combine_range(HashComponents.begin(),
+                                   HashComponents.end());
+}
Index: llvm/include/llvm/CodeGen/MachineStableHash.h
===================================================================
--- llvm/include/llvm/CodeGen/MachineStableHash.h
+++ llvm/include/llvm/CodeGen/MachineStableHash.h
@@ -17,6 +17,8 @@
 #include "llvm/CodeGen/StableHashing.h"
 
 namespace llvm {
+class MachineBasicBlock;
+class MachineFunction;
 class MachineInstr;
 class MachineOperand;
 
@@ -24,6 +26,8 @@
 stable_hash stableHashValue(const MachineInstr &MI, bool HashVRegs = false,
                             bool HashConstantPoolIndices = false,
                             bool HashMemOperands = false);
+stable_hash stableHashValue(const MachineBasicBlock &MBB);
+stable_hash stableHashValue(const MachineFunction &MF);
 
 } // namespace llvm
 


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