[SystemZ] Commenting (NFC)

Some minor commenting in scheduler files. Review: Ulrich Weigand git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332599 91177308-0d34-0410-b5e6-96231b3b80d8
emankov · May 17, 2018 · c42065a · c42065a
1 parent 8f090f6
commit c42065a
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Showing 2 changed files with 10 additions and 6 deletions.
diff --git a/lib/Target/SystemZ/SystemZScheduleZ13.td b/lib/Target/SystemZ/SystemZScheduleZ13.td
@@ -10,6 +10,8 @@
 // This file defines the machine model for Z13 to support instruction
 // scheduling and other instruction cost heuristics.
 //
+// Pseudos expanded right after isel do not need to be modelled here.
+//
 //===----------------------------------------------------------------------===//
 
 def Z13Model : SchedMachineModel {
@@ -28,9 +30,9 @@ def Z13Model : SchedMachineModel {
 
 let SchedModel = Z13Model in  {
 
-// These definitions could be put in a subtarget common include file,
-// but it seems the include system in Tablegen currently rejects
-// multiple includes of same file.
+// These definitions need the SchedModel value. They could be put in a
+// subtarget common include file, but it seems the include system in Tablegen
+// currently (2016) rejects multiple includes of same file.
 def : WriteRes<GroupAlone, []> {
   let NumMicroOps = 0;
   let BeginGroup  = 1;

diff --git a/lib/Target/SystemZ/SystemZScheduleZ14.td b/lib/Target/SystemZ/SystemZScheduleZ14.td
@@ -10,6 +10,8 @@
 // This file defines the machine model for Z14 to support instruction
 // scheduling and other instruction cost heuristics.
 //
+// Pseudos expanded right after isel do not need to be modelled here.
+//
 //===----------------------------------------------------------------------===//
 
 def Z14Model : SchedMachineModel {
@@ -28,9 +30,9 @@ def Z14Model : SchedMachineModel {
 
 let SchedModel = Z14Model in  {
 
-// These definitions could be put in a subtarget common include file,
-// but it seems the include system in Tablegen currently rejects
-// multiple includes of same file.
+// These definitions need the SchedModel value. They could be put in a
+// subtarget common include file, but it seems the include system in Tablegen
+// currently (2016) rejects multiple includes of same file.
 def : WriteRes<GroupAlone, []> {
   let NumMicroOps = 0;
   let BeginGroup  = 1;