[MCA] Improved handling of in-order issue/dispatch resources.

Added field 'MustIssueImmediately' to the instruction descriptor of instructions
that only consume in-order issue/dispatch processor resources.
This speeds up queries from the hardware Scheduler, and gives an average ~5%
speedup on a release build.

No functional change intended.

llvm-svn: 350397

1 files changed, 0 insertions, 18 deletions

diff --git a/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp b/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp
index c7f45fd9542..b68e996ff9e 100644
--- a/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp
+++ b/llvm/lib/MCA/HardwareUnits/ResourceManager.cpp
@@ -267,24 +267,6 @@ bool ResourceManager::canBeIssued(const InstrDesc &Desc) const {
       });
 }
 
-// Returns true if all resources are in-order, and there is at least one
-// resource which is a dispatch hazard (BufferSize = 0).
-bool ResourceManager::mustIssueImmediately(const InstrDesc &Desc) const {
-  if (!canBeIssued(Desc))
-    return false;
-  bool AllInOrderResources = all_of(Desc.Buffers, [&](uint64_t BufferMask) {
-    unsigned Index = getResourceStateIndex(BufferMask);
-    const ResourceState &Resource = *Resources[Index];
-    return Resource.isInOrder() || Resource.isADispatchHazard();
-  });
-  if (!AllInOrderResources)
-    return false;
-
-  return any_of(Desc.Buffers, [&](uint64_t BufferMask) {
-    return Resources[getResourceStateIndex(BufferMask)]->isADispatchHazard();
-  });
-}
-
 void ResourceManager::issueInstruction(
     const InstrDesc &Desc,
     SmallVectorImpl<std::pair<ResourceRef, ResourceCycles>> &Pipes) {