Revert "[GlobalISel] Import patterns containing INSERT_SUBREG"

When EXPENSIVE_CHECKS are enabled, GlobalISelEmitterSubreg.td doesn't get
stable output.

Reverting while I debug it.

See: https://reviews.llvm.org/D66498
llvm-svn: 370080

1 files changed, 0 insertions, 40 deletions

diff --git a/llvm/utils/TableGen/CodeGenTarget.cpp b/llvm/utils/TableGen/CodeGenTarget.cpp
index e9c0752..47e6934 100644
--- a/llvm/utils/TableGen/CodeGenTarget.cpp
+++ b/llvm/utils/TableGen/CodeGenTarget.cpp
@@ -295,46 +295,6 @@ CodeGenRegBank &CodeGenTarget::getRegBank() const {
   return *RegBank;
 }
 
-Optional<CodeGenRegisterClass *>
-CodeGenTarget::getSuperRegForSubReg(const ValueTypeByHwMode &ValueTy,
-                                    CodeGenRegBank &RegBank,
-                                    const CodeGenSubRegIndex *SubIdx) const {
-  std::vector<CodeGenRegisterClass *> Candidates;
-  auto &RegClasses = RegBank.getRegClasses();
-
-  // Try to find a register class which supports ValueTy, and also contains
-  // SubIdx.
-  for (CodeGenRegisterClass &RC : RegClasses) {
-    // Is there a subclass of this class which contains this subregister index?
-    CodeGenRegisterClass *SubClassWithSubReg = RC.getSubClassWithSubReg(SubIdx);
-    if (!SubClassWithSubReg)
-      continue;
-
-    // We have a class. Check if it supports this value type.
-    if (llvm::none_of(SubClassWithSubReg->VTs,
-                      [&ValueTy](const ValueTypeByHwMode &ClassVT) {
-                        return ClassVT == ValueTy;
-                      }))
-      continue;
-
-    // We have a register class which supports both the value type and
-    // subregister index. Remember it.
-    Candidates.push_back(SubClassWithSubReg);
-  }
-
-  // If we didn't find anything, we're done.
-  if (Candidates.empty())
-    return None;
-
-  // Find and return the largest of our candidate classes.
-  llvm::sort(Candidates,
-             [&](const CodeGenRegisterClass *A, const CodeGenRegisterClass *B) {
-               return A->getMembers().size() > B->getMembers().size();
-             });
-
-  return Candidates[0];
-}
-
 void CodeGenTarget::ReadRegAltNameIndices() const {
   RegAltNameIndices = Records.getAllDerivedDefinitions("RegAltNameIndex");
   llvm::sort(RegAltNameIndices, LessRecord());