Don't recalculate the loop info and loop dominators analyses if they're

preserved.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45596 91177308-0d34-0410-b5e6-96231b3b80d8

7 files changed, 26 insertions, 6 deletions

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 46cdec7bd6..5c9d69a231 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -60,6 +60,8 @@ namespace {
 void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addPreserved<LiveVariables>();
   AU.addRequired<LiveVariables>();
+  AU.addPreservedID(MachineLoopInfoID);
+  AU.addPreservedID(MachineDominatorsID);
   AU.addPreservedID(PHIEliminationID);
   AU.addRequiredID(PHIEliminationID);
   AU.addRequiredID(TwoAddressInstructionPassID);
diff --git a/lib/CodeGen/MachineDominators.cpp b/lib/CodeGen/MachineDominators.cpp
index e343240ea2..7c521ccb0e 100644
--- a/lib/CodeGen/MachineDominators.cpp
+++ b/lib/CodeGen/MachineDominators.cpp
@@ -13,12 +13,17 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/CodeGen/MachineDominators.h"
+#include "llvm/CodeGen/Passes.h"
 
 using namespace llvm;
 
 TEMPLATE_INSTANTIATION(class DomTreeNodeBase<MachineBasicBlock>);
 TEMPLATE_INSTANTIATION(class DominatorTreeBase<MachineBasicBlock>);
 
-char MachineDominatorTree::ID = 0;
-static RegisterPass<MachineDominatorTree>
-E("machinedomtree", "MachineDominator Tree Construction", true);
+namespace {
+  char MachineDominatorTree::ID = 0;
+  RegisterPass<MachineDominatorTree>
+  E("machinedomtree", "MachineDominator Tree Construction", true);
+}
+
+const PassInfo *llvm::MachineDominatorsID = E.getPassInfo();
diff --git a/lib/CodeGen/MachineLoopInfo.cpp b/lib/CodeGen/MachineLoopInfo.cpp
index d134357d2a..ad4ad1cea9 100644
--- a/lib/CodeGen/MachineLoopInfo.cpp
+++ b/lib/CodeGen/MachineLoopInfo.cpp
@@ -16,15 +16,20 @@
 
 #include "llvm/CodeGen/MachineLoopInfo.h"
 #include "llvm/CodeGen/MachineDominators.h"
+#include "llvm/CodeGen/Passes.h"
 
 using namespace llvm;
 
 TEMPLATE_INSTANTIATION(class LoopBase<MachineBasicBlock>);
 TEMPLATE_INSTANTIATION(class LoopInfoBase<MachineBasicBlock>);
 
-char MachineLoopInfo::ID = 0;
-static RegisterPass<MachineLoopInfo>
-X("machine-loops", "Machine Natural Loop Construction", true);
+namespace {
+  char MachineLoopInfo::ID = 0;
+  RegisterPass<MachineLoopInfo>
+  X("machine-loops", "Machine Natural Loop Construction", true);
+}
+
+const PassInfo *llvm::MachineLoopInfoID = X.getPassInfo();
 
 bool MachineLoopInfo::runOnMachineFunction(MachineFunction &) {
   releaseMemory();
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index 07c4ef3f50..9276937561 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -51,6 +51,8 @@ namespace {
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
       AU.addPreserved<LiveVariables>();
+      AU.addPreservedID(MachineLoopInfoID);
+      AU.addPreservedID(MachineDominatorsID);
       MachineFunctionPass::getAnalysisUsage(AU);
     }
 
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 17d416a4a6..6f850eb1b3 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -104,6 +104,8 @@ namespace {
       // to coalescing and which analyses coalescing invalidates.
       AU.addRequiredTransitive<RegisterCoalescer>();
       AU.addRequired<MachineLoopInfo>();
+      AU.addPreserved<MachineLoopInfo>();
+      AU.addPreservedID(MachineDominatorsID);
       MachineFunctionPass::getAnalysisUsage(AU);
     }
 
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp
index 69dd56d843..de94688e3a 100644
--- a/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -67,6 +67,8 @@ const PassInfo *llvm::SimpleRegisterCoalescingID = X.getPassInfo();
 
 void SimpleRegisterCoalescing::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addPreserved<LiveIntervals>();
+  AU.addPreserved<MachineLoopInfo>();
+  AU.addPreservedID(MachineDominatorsID);
   AU.addPreservedID(PHIEliminationID);
   AU.addPreservedID(TwoAddressInstructionPassID);
   AU.addRequired<LiveVariables>();
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index dd71bec7eb..8f0c473d48 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -69,6 +69,8 @@ const PassInfo *llvm::TwoAddressInstructionPassID = X.getPassInfo();
 void TwoAddressInstructionPass::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<LiveVariables>();
   AU.addPreserved<LiveVariables>();
+  AU.addPreservedID(MachineLoopInfoID);
+  AU.addPreservedID(MachineDominatorsID);
   AU.addPreservedID(PHIEliminationID);
   MachineFunctionPass::getAnalysisUsage(AU);
 }