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MachineScheduler: Introduce ONLY1 reason to improve debug output

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2016-05-27 22:14:26 +00:00
parent da265fc2fa
commit a827bf1ce5
2 changed files with 15 additions and 8 deletions
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4
include/llvm/CodeGen/MachineScheduler.h
View File

@ -764,8 +764,8 @@ public:
/// Represent the type of SchedCandidate found within a single queue.
/// pickNodeBidirectional depends on these listed by decreasing priority.
enum CandReason {
NoCand, PhysRegCopy, RegExcess, RegCritical, Stall, Cluster, Weak, RegMax,
ResourceReduce, ResourceDemand, BotHeightReduce, BotPathReduce,
NoCand, Only1, PhysRegCopy, RegExcess, RegCritical, Stall, Cluster, Weak,
RegMax, ResourceReduce, ResourceDemand, BotHeightReduce, BotPathReduce,
TopDepthReduce, TopPathReduce, NextDefUse, NodeOrder};
#ifndef NDEBUG

19
lib/CodeGen/MachineScheduler.cpp
View File

@ -2396,7 +2396,8 @@ const char *GenericSchedulerBase::getReasonStr(
GenericSchedulerBase::CandReason Reason) {
switch (Reason) {
case NoCand: return "NOCAND ";
case PhysRegCopy: return "PREG-COPY";
case Only1: return "ONLY1 ";
case PhysRegCopy: return "PREG-COPY ";
case RegExcess: return "REG-EXCESS";
case RegCritical: return "REG-CRIT ";
case Stall: return "STALL ";
@ -2528,10 +2529,14 @@ static bool tryLatency(GenericSchedulerBase::SchedCandidate &TryCand,
return false;
}
static void tracePick(GenericSchedulerBase::CandReason Reason, bool IsTop) {
DEBUG(dbgs() << "Pick " << (IsTop ? "Top " : "Bot ")
<< GenericSchedulerBase::getReasonStr(Reason) << '\n');
}
static void tracePick(const GenericSchedulerBase::SchedCandidate &Cand,
bool IsTop) {
DEBUG(dbgs() << "Pick " << (IsTop ? "Top " : "Bot ")
<< GenericSchedulerBase::getReasonStr(Cand.Reason) << '\n');
tracePick(Cand.Reason, IsTop);
}
void GenericScheduler::initialize(ScheduleDAGMI *dag) {
@ -2917,12 +2922,12 @@ SUnit *GenericScheduler::pickNodeBidirectional(bool &IsTopNode) {
// efficient, but also provides the best heuristics for CriticalPSets.
if (SUnit *SU = Bot.pickOnlyChoice()) {
IsTopNode = false;
DEBUG(dbgs() << "Pick Bot ONLY1\n");
tracePick(Only1, false);
return SU;
}
if (SUnit *SU = Top.pickOnlyChoice()) {
IsTopNode = true;
DEBUG(dbgs() << "Pick Top ONLY1\n");
tracePick(Only1, true);
return SU;
}
CandPolicy NoPolicy;
@ -3187,7 +3192,9 @@ SUnit *PostGenericScheduler::pickNode(bool &IsTopNode) {
SUnit *SU;
do {
SU = Top.pickOnlyChoice();
if (!SU) {
if (SU) {
tracePick(Only1, true);
} else {
CandPolicy NoPolicy;
SchedCandidate TopCand(NoPolicy);
// Set the top-down policy based on the state of the current top zone and