GlobalISel: Add known bits to InstructionSelector

AMDGPU uses this for some addressing mode selection patterns. The
analysis run itself doesn't do anything so it seems easier to just
always require this than adding a way to opt in.

llvm-svn: 370388

1 files changed, 5 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp b/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
index d699b4d2d42..1fc12359cd8 100644
--- a/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
@@ -12,6 +12,7 @@
 #include "llvm/CodeGen/GlobalISel/InstructionSelect.h"
 #include "llvm/ADT/PostOrderIterator.h"
 #include "llvm/ADT/Twine.h"
+#include "llvm/CodeGen/GlobalISel/GISelKnownBits.h"
 #include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
 #include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
 #include "llvm/CodeGen/GlobalISel/Utils.h"
@@ -53,6 +54,8 @@ InstructionSelect::InstructionSelect() : MachineFunctionPass(ID) { }
 
 void InstructionSelect::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<TargetPassConfig>();
+  AU.addRequired<GISelKnownBitsAnalysis>();
+  AU.addPreserved<GISelKnownBitsAnalysis>();
   getSelectionDAGFallbackAnalysisUsage(AU);
   MachineFunctionPass::getAnalysisUsage(AU);
 }
@@ -64,12 +67,13 @@ bool InstructionSelect::runOnMachineFunction(MachineFunction &MF) {
     return false;
 
   LLVM_DEBUG(dbgs() << "Selecting function: " << MF.getName() << '\n');
+  GISelKnownBits &KB = getAnalysis<GISelKnownBitsAnalysis>().get(MF);
 
   const TargetPassConfig &TPC = getAnalysis<TargetPassConfig>();
   InstructionSelector *ISel = MF.getSubtarget().getInstructionSelector();
   CodeGenCoverage CoverageInfo;
   assert(ISel && "Cannot work without InstructionSelector");
-  ISel->setupMF(MF, CoverageInfo);
+  ISel->setupMF(MF, KB, CoverageInfo);
 
   // An optimization remark emitter. Used to report failures.
   MachineOptimizationRemarkEmitter MORE(MF, /*MBFI=*/nullptr);