[llvm] r328272 - State that CFG is preserved in 'Falkor HW Prefetch Fix Late Phase'.

[Michael Zolotukhin via llvm-commits]

Author: mzolotukhin
Date: Thu Mar 22 16:44:40 2018
New Revision: 328272

URL: http://llvm.org/viewvc/llvm-project?rev=328272&view=rev
Log:
State that CFG is preserved in 'Falkor HW Prefetch Fix Late Phase'.

That removes some redundant recomputations from the passes pipeline.

Modified:
    llvm/trunk/lib/Target/AArch64/AArch64FalkorHWPFFix.cpp
    llvm/trunk/test/CodeGen/AArch64/O3-pipeline.ll

Modified: llvm/trunk/lib/Target/AArch64/AArch64FalkorHWPFFix.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/AArch64FalkorHWPFFix.cpp?rev=328272&r1=328271&r2=328272&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AArch64/AArch64FalkorHWPFFix.cpp (original)
+++ llvm/trunk/lib/Target/AArch64/AArch64FalkorHWPFFix.cpp Thu Mar 22 16:44:40 2018
@@ -187,6 +187,7 @@ public:
   bool runOnMachineFunction(MachineFunction &Fn) override;
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
     AU.addRequired<MachineLoopInfo>();
     MachineFunctionPass::getAnalysisUsage(AU);
   }

Modified: llvm/trunk/test/CodeGen/AArch64/O3-pipeline.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/O3-pipeline.ll?rev=328272&r1=328271&r2=328272&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/AArch64/O3-pipeline.ll (original)
+++ llvm/trunk/test/CodeGen/AArch64/O3-pipeline.ll Thu Mar 22 16:44:40 2018
@@ -142,8 +142,6 @@
 ; CHECK-NEXT:       MachineDominator Tree Construction
 ; CHECK-NEXT:       Machine Natural Loop Construction
 ; CHECK-NEXT:       Falkor HW Prefetch Fix Late Phase
-; CHECK-NEXT:       MachineDominator Tree Construction
-; CHECK-NEXT:       Machine Natural Loop Construction
 ; CHECK-NEXT:       PostRA Machine Instruction Scheduler
 ; CHECK-NEXT:       Analyze Machine Code For Garbage Collection
 ; CHECK-NEXT:       Machine Block Frequency Analysis