[llvm] MLRegAlloc: Do not use float to count number of used registers (PR #118489)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-regalloc

Author: Matt Arsenault (arsenm)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/118489.diff


1 Files Affected:

- (modified) llvm/lib/CodeGen/MLRegAllocEvictAdvisor.cpp (+4-5) 


``````````diff
diff --git a/llvm/lib/CodeGen/MLRegAllocEvictAdvisor.cpp b/llvm/lib/CodeGen/MLRegAllocEvictAdvisor.cpp
index d099544c2a4918..03f015f8c9e32d 100644
--- a/llvm/lib/CodeGen/MLRegAllocEvictAdvisor.cpp
+++ b/llvm/lib/CodeGen/MLRegAllocEvictAdvisor.cpp
@@ -559,14 +559,13 @@ class DevelopmentModeEvictionAdvisorAnalysis final
 
 float MLEvictAdvisor::getInitialQueueSize(const MachineFunction &MF) {
   auto &MRI = MF.getRegInfo();
-  float Ret = 0.0;
+  unsigned NumUsedRegs = 0;
   for (unsigned I = 0, E = MRI.getNumVirtRegs(); I != E; ++I) {
     Register Reg = Register::index2VirtReg(I);
-    if (MRI.reg_nodbg_empty(Reg))
-      continue;
-    ++Ret;
+    if (!MRI.reg_nodbg_empty(Reg))
+      ++NumUsedRegs;
   }
-  return Ret;
+  return static_cast<float>(NumUsedRegs);
 }
 
 MLEvictAdvisor::MLEvictAdvisor(const MachineFunction &MF, const RAGreedy &RA,

``````````

</details>


https://github.com/llvm/llvm-project/pull/118489