Subzero: Count lookups of each constant value in the constant pool.

src/IceDefs.h

 //===- subzero/src/IceDefs.h - Common Subzero declarations ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 193 matching lines @@
   IceV_Succs = 1 << 4,
   IceV_Liveness = 1 << 5,
   IceV_RegOrigins = 1 << 6,
   IceV_LinearScan = 1 << 7,
   IceV_Frame = 1 << 8,
   IceV_AddrOpt = 1 << 9,
   IceV_Random = 1 << 10,
   IceV_Folding = 1 << 11,
   IceV_RMW = 1 << 12,
   IceV_Loop = 1 << 13,
-  IceV_Status = 1 << 14,
-  IceV_AvailableRegs = 1 << 15,
-  IceV_Mem = 1 << 16,
-  IceV_GlobalInit = 1 << 17,
+  IceV_Mem = 1 << 14,
+  // Leave some extra space to make it easier to add new per-pass items.
+  IceV_NO_PER_PASS_DUMP_BEYOND = 1 << 19,
+  // Items greater than IceV_NO_PER_PASS_DUMP_BEYOND don't by themselves trigger
+  // per-pass Cfg dump output.
+  IceV_Status = 1 << 20,
+  IceV_AvailableRegs = 1 << 21,
+  IceV_GlobalInit = 1 << 22,
+  IceV_ConstPoolStats = 1 << 23,
   IceV_All = ~IceV_None,
-  IceV_Most = IceV_All & ~IceV_LinearScan & ~IceV_GlobalInit
+  IceV_Most =
+      IceV_All & ~IceV_LinearScan & ~IceV_GlobalInit & IceV_ConstPoolStats
 };
 using VerboseMask = uint32_t;
 
 enum FileType {
   FT_Elf, /// ELF .o file
   FT_Asm, /// Assembly .s file
   FT_Iasm /// "Integrated assembler" .byte-style .s file
 };
 
 using Ostream = llvm::raw_ostream;
@@ skipping 49 matching lines @@
   RPE_PooledConstantReordering,
   RPE_RegAllocRandomization,
   RPE_num
 };
 
 using RelocOffsetArray = llvm::SmallVector<class RelocOffset *, 4>;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H