[llvm] [AMDGPU][SIPreEmitPeephole] mustRetainExeczBranch: estimate ThenBlock cost using MachineTraceInfo (PR #111117)

[Matt Arsenault via llvm-commits]

Juan Manuel Martinez =?utf-8?q?Caama=C3=B1o?= <juamarti at amd.com>,
Juan Manuel Martinez =?utf-8?q?Caama=C3=B1o?= <juamarti at amd.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/111117 at github.com>


================
@@ -15,36 +15,41 @@
 #include "GCNSubtarget.h"
 #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineTraceMetrics.h"
+#include "llvm/CodeGen/TargetSchedule.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/Support/BranchProbability.h"
 
 using namespace llvm;
 
 #define DEBUG_TYPE "si-pre-emit-peephole"
 
-static unsigned SkipThreshold;
-
-static cl::opt<unsigned, true> SkipThresholdFlag(
-    "amdgpu-skip-threshold", cl::Hidden,
-    cl::desc(
-        "Number of instructions before jumping over divergent control flow"),
-    cl::location(SkipThreshold), cl::init(12));
-
 namespace {
 
 class SIPreEmitPeephole : public MachineFunctionPass {
 private:
   const SIInstrInfo *TII = nullptr;
   const SIRegisterInfo *TRI = nullptr;
+  MachineTraceMetrics *Traces = nullptr;
+  MachineTraceMetrics::Ensemble *MinInstr;
----------------
arsenm wrote:

Comment these? 

https://github.com/llvm/llvm-project/pull/111117