From 0bfab27b4601c633884e096fff06add64cf4bdf3 Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Thu, 4 Jan 2018 23:09:03 -0800
Subject: [PATCH] irjit: Calculate bloat statistics.

At least based on IR for now.  Can do something else later.

memset() was causing a crash on the std::map.
---
 Core/MIPS/IR/IRJit.cpp | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/Core/MIPS/IR/IRJit.cpp b/Core/MIPS/IR/IRJit.cpp
index 3c6b6a511d..87cd45a46a 100644
--- a/Core/MIPS/IR/IRJit.cpp
+++ b/Core/MIPS/IR/IRJit.cpp
@@ -234,9 +234,33 @@ JitBlockDebugInfo IRBlockCache::GetBlockDebugInfo(int blockNum) const {
 }
 
 void IRBlockCache::ComputeStats(BlockCacheStats &bcStats) const {
-	// TODO: Implement properly
-	memset(&bcStats, 0, sizeof(bcStats));
+	double totalBloat = 0.0;
+	double maxBloat = 0.0;
+	double minBloat = 1000000000.0;
+	for (const auto &b : blocks_) {
+		double codeSize = (double)b.GetNumInstructions() * sizeof(IRInst);
+		if (codeSize == 0)
+			continue;
+
+		u32 origAddr, mipsBytes;
+		b.GetRange(origAddr, mipsBytes);
+		double origSize = (double)mipsBytes;
+		double bloat = codeSize / origSize;
+		if (bloat < minBloat) {
+			minBloat = bloat;
+			bcStats.minBloatBlock = origAddr;
+		}
+		if (bloat > maxBloat) {
+			maxBloat = bloat;
+			bcStats.maxBloatBlock = origAddr;
+		}
+		totalBloat += bloat;
+		bcStats.bloatMap[bloat] = origAddr;
+	}
 	bcStats.numBlocks = (int)blocks_.size();
+	bcStats.minBloat = minBloat;
+	bcStats.maxBloat = maxBloat;
+	bcStats.avgBloat = totalBloat / (double)blocks_.size();
 }
 
 int IRBlockCache::GetBlockNumberFromStartAddress(u32 em_address, bool realBlocksOnly) const {