[llvm] [AMDGPU] Add iglp_opt(2) to provide initial MFMA/Exp interleaving (PR #80370)

[Matt Arsenault via llvm-commits]

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@@ -904,6 +909,854 @@ void MFMASmallGemmOpt::applyIGLPStrategy(
   }
 }
 
+class MFMAExpInterleaveOpt final : public IGLPStrategy {
+private:
+  /// Whether or not the instruction is a transitive predecessor of an MFMA
+  /// instruction
+  class IsPipeExp final : public InstructionRule {
+  public:
+    bool apply(const SUnit *SU, const ArrayRef<SUnit *> Collection,
+               SmallVectorImpl<SchedGroup> &SyncPipe) override {
+
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arsenm wrote:

Blank line at start 

https://github.com/llvm/llvm-project/pull/80370