[PATCH] D50511: [ARM] ParallelDSP: add option to disable the pass

[Sjoerd Meijer via Phabricator via llvm-commits]

SjoerdMeijer created this revision.
SjoerdMeijer added a reviewer: samparker.
Herald added a reviewer: javed.absar.
Herald added subscribers: chrib, kristof.beyls.

Seems useful for debugging purposes.


https://reviews.llvm.org/D50511

Files:
  lib/Target/ARM/ARMParallelDSP.cpp


Index: lib/Target/ARM/ARMParallelDSP.cpp
===================================================================
--- lib/Target/ARM/ARMParallelDSP.cpp
+++ lib/Target/ARM/ARMParallelDSP.cpp
@@ -42,6 +42,10 @@
 
 STATISTIC(NumSMLAD , "Number of smlad instructions generated");
 
+static cl::opt<bool>
+DisableParallelDSP("disable-arm-parallel-dsp", cl::Hidden, cl::init(false),
+                   cl::desc("Disable the ARM Parallel DSP pass"));
+
 namespace {
   struct OpChain;
   struct BinOpChain;
@@ -149,6 +153,8 @@
     }
 
     bool runOnLoop(Loop *TheLoop, LPPassManager &) override {
+      if (DisableParallelDSP)
+        return false;
       L = TheLoop;
       SE = &getAnalysis<ScalarEvolutionWrapperPass>().getSE();
       AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();


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