[llvm] r308572 - Replace -print-whole-regmask with a threshold.

[Matt Arsenault via llvm-commits]

Author: arsenm
Date: Wed Jul 19 17:37:31 2017
New Revision: 308572

URL: http://llvm.org/viewvc/llvm-project?rev=308572&view=rev
Log:
Replace -print-whole-regmask with a threshold.

The previous flag/default of printing everything is
not helpful when there are thousands of registers
in the mask.

Modified:
    llvm/trunk/lib/CodeGen/MachineInstr.cpp

Modified: llvm/trunk/lib/CodeGen/MachineInstr.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineInstr.cpp?rev=308572&r1=308571&r2=308572&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineInstr.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineInstr.cpp Wed Jul 19 17:37:31 2017
@@ -73,10 +73,12 @@
 
 using namespace llvm;
 
-static cl::opt<bool> PrintWholeRegMask(
-    "print-whole-regmask",
-    cl::desc("Print the full contents of regmask operands in IR dumps"),
-    cl::init(true), cl::Hidden);
+static cl::opt<int> PrintRegMaskNumRegs(
+    "print-regmask-num-regs",
+    cl::desc("Number of registers to limit to when "
+             "printing regmask operands in IR dumps. "
+             "unlimited = -1"),
+    cl::init(32), cl::Hidden);
 
 //===----------------------------------------------------------------------===//
 // MachineOperand Implementation
@@ -503,7 +505,8 @@ void MachineOperand::print(raw_ostream &
       unsigned MaskWord = i / 32;
       unsigned MaskBit = i % 32;
       if (getRegMask()[MaskWord] & (1 << MaskBit)) {
-        if (PrintWholeRegMask || NumRegsEmitted <= 10) {
+        if (PrintRegMaskNumRegs < 0 ||
+            NumRegsEmitted <= static_cast<unsigned>(PrintRegMaskNumRegs)) {
           OS << " " << PrintReg(i, TRI);
           NumRegsEmitted++;
         }