[llvm] Changed default value of slp-max-vf to 192 (PR #70479)

[Dmitriy Smirnov via llvm-commits]

https://github.com/d-smirnov updated https://github.com/llvm/llvm-project/pull/70479

>From 8d0ea9365fc51e8cdb93e78da99fa80487b38d03 Mon Sep 17 00:00:00 2001
From: Dmitriy Smirnov <dmitriy.smirnov at arm.com>
Date: Fri, 27 Oct 2023 15:58:46 +0000
Subject: [PATCH] Changed default value of slp-max-vf to 192

1. Changed default value of slp-max-vf to 192
2. Minor performance fix: SmallSet -> SmallDenseSet
---
 llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index b6895c649f838c1..1cc6248caa76e44 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -138,8 +138,8 @@ MaxVectorRegSizeOption("slp-max-reg-size", cl::init(128), cl::Hidden,
     cl::desc("Attempt to vectorize for this register size in bits"));
 
 static cl::opt<unsigned>
-MaxVFOption("slp-max-vf", cl::init(0), cl::Hidden,
-    cl::desc("Maximum SLP vectorization factor (0=unlimited)"));
+    MaxVFOption("slp-max-vf", cl::init(192), cl::Hidden,
+                cl::desc("Maximum SLP vectorization factor (0=unlimited)"));
 
 /// Limits the size of scheduling regions in a block.
 /// It avoid long compile times for _very_ large blocks where vector
@@ -4135,7 +4135,7 @@ static bool areTwoInsertFromSameBuildVector(
   // Go through the vector operand of insertelement instructions trying to find
   // either VU as the original vector for IE2 or V as the original vector for
   // IE1.
-  SmallSet<int, 8> ReusedIdx;
+  SmallDenseSet<int, 8> ReusedIdx;
   bool IsReusedIdx = false;
   do {
     if (IE2 == VU && !IE1)