[AArch64, X86] Additional debug information for MacroFusion

In order to make it easier to parse information about the performance of
MacroFusion, this patch adds the function and the instruction names to the
debug output of this pass.

llvm-svn: 297504

1 files changed, 13 insertions, 5 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp b/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp
index 364016e8203..1cac19b8139 100644
--- a/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp
+++ b/llvm/lib/Target/AArch64/AArch64MacroFusion.cpp
@@ -209,11 +209,19 @@ static bool scheduleAdjacentImpl(ScheduleDAGMI *DAG, SUnit *ASU,
         Dep.setLatency(0);
 
     ++NumFused;
-    DEBUG(dbgs() << "Macro fuse ";
-          Preds ? BSU->print(dbgs(), DAG) : ASU->print(dbgs(), DAG);
-          dbgs() << " - ";
-          Preds ? ASU->print(dbgs(), DAG) : BSU->print(dbgs(), DAG);
-          dbgs() << '\n');
+    DEBUG({ SUnit *LSU = Preds ? BSU : ASU;
+            SUnit *RSU = Preds ? ASU : BSU;
+            const MachineInstr *LMI = Preds ? BMI : AMI;
+            const MachineInstr *RMI = Preds ? AMI : BMI;
+
+            dbgs() << DAG->MF.getName() << "(): Macro fuse ";
+            LSU->print(dbgs(), DAG);
+            dbgs() << " - ";
+            RSU->print(dbgs(), DAG);
+            dbgs() << " / " <<
+                      TII->getName(LMI->getOpcode()) << " - " <<
+                      TII->getName(RMI->getOpcode()) << '\n';
+          });
 
     return true;
   }