[llvm] r248587 - AMDGPU: Fix recomputing dominator tree unnecessarily

[Matt Arsenault via llvm-commits]

Author: arsenm
Date: Fri Sep 25 12:21:28 2015
New Revision: 248587

URL: http://llvm.org/viewvc/llvm-project?rev=248587&view=rev
Log:
AMDGPU: Fix recomputing dominator tree unnecessarily

SIFixSGPRCopies does not modify the CFG, but this was
being recomputed before running SIFoldOperands.

Modified:
    llvm/trunk/lib/Target/AMDGPU/SIFixSGPRCopies.cpp
    llvm/trunk/lib/Target/AMDGPU/SIFoldOperands.cpp
    llvm/trunk/lib/Target/AMDGPU/SIInsertWaits.cpp
    llvm/trunk/lib/Target/AMDGPU/SILowerControlFlow.cpp
    llvm/trunk/lib/Target/AMDGPU/SILowerI1Copies.cpp
    llvm/trunk/lib/Target/AMDGPU/SIPrepareScratchRegs.cpp

Modified: llvm/trunk/lib/Target/AMDGPU/SIFixSGPRCopies.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/SIFixSGPRCopies.cpp?rev=248587&r1=248586&r2=248587&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/SIFixSGPRCopies.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/SIFixSGPRCopies.cpp Fri Sep 25 12:21:28 2015
@@ -105,6 +105,10 @@ public:
     return "SI Fix SGPR copies";
   }
 
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    MachineFunctionPass::getAnalysisUsage(AU);
+  }
 };
 
 } // End anonymous namespace

Modified: llvm/trunk/lib/Target/AMDGPU/SIFoldOperands.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/SIFoldOperands.cpp?rev=248587&r1=248586&r2=248587&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/SIFoldOperands.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/SIFoldOperands.cpp Fri Sep 25 12:21:28 2015
@@ -45,6 +45,7 @@ public:
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<MachineDominatorTree>();
+    AU.addPreserved<MachineDominatorTree>();
     AU.setPreservesCFG();
     MachineFunctionPass::getAnalysisUsage(AU);
   }

Modified: llvm/trunk/lib/Target/AMDGPU/SIInsertWaits.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/SIInsertWaits.cpp?rev=248587&r1=248586&r2=248587&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/SIInsertWaits.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/SIInsertWaits.cpp Fri Sep 25 12:21:28 2015
@@ -121,9 +121,13 @@ public:
   bool runOnMachineFunction(MachineFunction &MF) override;
 
   const char *getPassName() const override {
-    return "SI insert wait  instructions";
+    return "SI insert wait instructions";
   }
 
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    MachineFunctionPass::getAnalysisUsage(AU);
+  }
 };
 
 } // End anonymous namespace

Modified: llvm/trunk/lib/Target/AMDGPU/SILowerControlFlow.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/SILowerControlFlow.cpp?rev=248587&r1=248586&r2=248587&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/SILowerControlFlow.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/SILowerControlFlow.cpp Fri Sep 25 12:21:28 2015
@@ -103,6 +103,10 @@ public:
     return "SI Lower control flow instructions";
   }
 
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    MachineFunctionPass::getAnalysisUsage(AU);
+  }
 };
 
 } // End anonymous namespace

Modified: llvm/trunk/lib/Target/AMDGPU/SILowerI1Copies.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/SILowerI1Copies.cpp?rev=248587&r1=248586&r2=248587&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/SILowerI1Copies.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/SILowerI1Copies.cpp Fri Sep 25 12:21:28 2015
@@ -48,6 +48,7 @@ public:
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<MachineDominatorTree>();
+    AU.addPreserved<MachineDominatorTree>();
     AU.setPreservesCFG();
     MachineFunctionPass::getAnalysisUsage(AU);
   }

Modified: llvm/trunk/lib/Target/AMDGPU/SIPrepareScratchRegs.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AMDGPU/SIPrepareScratchRegs.cpp?rev=248587&r1=248586&r2=248587&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AMDGPU/SIPrepareScratchRegs.cpp (original)
+++ llvm/trunk/lib/Target/AMDGPU/SIPrepareScratchRegs.cpp Fri Sep 25 12:21:28 2015
@@ -47,6 +47,10 @@ public:
     return "SI prepare scratch registers";
   }
 
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    MachineFunctionPass::getAnalysisUsage(AU);
+  }
 };
 
 } // End anonymous namespace