diff --git a/Core/MIPS/IR/IRInst.cpp b/Core/MIPS/IR/IRInst.cpp
index 376f9951b2..191ab8b2f7 100644
--- a/Core/MIPS/IR/IRInst.cpp
+++ b/Core/MIPS/IR/IRInst.cpp
@@ -1,6 +1,7 @@
 #include "Common/CommonFuncs.h"
 #include "Core/MIPS/IR/IRInst.h"
 #include "Core/MIPS/MIPSDebugInterface.h"
+#include "Core/HLE/ReplaceTables.h"
 
 // Legend
 // ======================
@@ -13,6 +14,7 @@
 //  2 = FPR register, Vec2 (uncommon)
 //  v = Vec4Init constant, chosen by immediate
 //  s = Shuffle immediate (4 2-bit fields, choosing a xyzw shuffle)
+//  r = Replacement function (in constant field)
 
 static const IRMeta irMeta[] = {
 	{ IROp::Nop, "Nop", "" },
@@ -165,7 +167,7 @@ static const IRMeta irMeta[] = {
 	{ IROp::Break, "Break", "", IRFLAG_EXIT },
 	{ IROp::SetPC, "SetPC", "_G" },
 	{ IROp::SetPCConst, "SetPC", "_C" },
-	{ IROp::CallReplacement, "CallRepl", "GC", IRFLAG_BARRIER },
+	{ IROp::CallReplacement, "CallRepl", "Gr", IRFLAG_BARRIER },
 	{ IROp::Breakpoint, "Breakpoint", "_C", IRFLAG_BARRIER },
 	{ IROp::MemoryCheck, "MemoryCheck", "IGC", IRFLAG_BARRIER },
 
@@ -306,6 +308,16 @@ void DisassembleParam(char *buf, int bufSize, u8 param, char type, u32 constant)
 	case 's':
 		snprintf(buf, bufSize, "%c%c%c%c", xyzw[param & 3], xyzw[(param >> 2) & 3], xyzw[(param >> 4) & 3], xyzw[(param >> 6) & 3]);
 		break;
+	case 'r':
+	{
+		const ReplacementTableEntry *entry = GetReplacementFunc(constant);
+		if (entry) {
+			snprintf(buf, bufSize, "%s", entry->name);
+		} else {
+			snprintf(buf, bufSize, "(unkn. repl %d)", constant);
+		}
+		break;
+	}
 	case '_':
 	case '\0':
 		buf[0] = 0;
diff --git a/Core/MIPS/MIPSTables.cpp b/Core/MIPS/MIPSTables.cpp
index 4b909c2d03..f864191b10 100644
--- a/Core/MIPS/MIPSTables.cpp
+++ b/Core/MIPS/MIPSTables.cpp
@@ -188,7 +188,7 @@ static const MIPSInstruction tableSpecial[64] = // 000000 ..... ..... ..... ....
 	INSTR("jalr",  JITFUNC(Comp_JumpReg), Dis_JumpRegType, Int_JumpRegType, IS_JUMP|IN_RS|OUT_RD|DELAYSLOT),
 	INSTR("movz",  JITFUNC(Comp_RType3), Dis_RType3, Int_RType3, OUT_RD|IN_RS|IN_RT|IS_CONDMOVE|CONDTYPE_EQ),
 	INSTR("movn",  JITFUNC(Comp_RType3), Dis_RType3, Int_RType3, OUT_RD|IN_RS|IN_RT|IS_CONDMOVE|CONDTYPE_NE),
-	INSTR("syscall", JITFUNC(Comp_Syscall), Dis_Syscall, Int_Syscall, IN_MEM|IN_OTHER|OUT_MEM|OUT_OTHER),
+	INSTR("syscall", JITFUNC(Comp_Syscall), Dis_Syscall, Int_Syscall, IN_MEM|IN_OTHER|OUT_MEM|OUT_OTHER|IS_SYSCALL),
 	INSTR("break", JITFUNC(Comp_Break), Dis_Generic, Int_Break, 0),
 	INVALID,
 	INSTR("sync",  JITFUNC(Comp_DoNothing), Dis_Generic, Int_Sync, 0),
diff --git a/Core/MIPS/MIPSTables.h b/Core/MIPS/MIPSTables.h
index 9c53a07ea0..905c69d6be 100644
--- a/Core/MIPS/MIPSTables.h
+++ b/Core/MIPS/MIPSTables.h
@@ -92,6 +92,8 @@
 
 #define OUT_VD          0x100000000000ULL
 
+#define IS_SYSCALL      0x200000000000ULL
+
 #ifndef CDECL
 #define CDECL
 #endif
diff --git a/UI/JitCompareScreen.cpp b/UI/JitCompareScreen.cpp
index 0792a05141..540fe47849 100644
--- a/UI/JitCompareScreen.cpp
+++ b/UI/JitCompareScreen.cpp
@@ -9,6 +9,13 @@
 #include "Core/MIPS/JitCommon/JitState.h"
 
 JitCompareScreen::JitCompareScreen() : UIDialogScreenWithBackground() {
+	JitBlockCacheDebugInterface *blockCacheDebug = MIPSComp::jit->GetBlockCacheDebugInterface();
+	// The only defaults that make sense.
+	if (blockCacheDebug->SupportsProfiling()) {
+		listSort_ = ListSort::TIME_SPENT;
+	} else {
+		listSort_ = ListSort::BLOCK_LENGTH_DESC;
+	}
 	FillBlockList();
 }
 
@@ -166,12 +173,15 @@ void JitCompareScreen::FillBlockList() {
 		case ListType::FPU_BLOCKS:
 		case ListType::VFPU_BLOCKS:
 		{
-			const int flags = listType_ == ListType::FPU_BLOCKS ? IS_FPU : IS_VFPU;
+			const uint64_t flags = listType_ == ListType::FPU_BLOCKS ? IS_FPU : IS_VFPU;
+			// const uint64_t antiFlags = IS_SYSCALL;
+			const uint64_t antiFlags = 0;
 			JitBlockMeta meta = blockCacheDebug->GetBlockMeta(i);
 			if (meta.valid) {
 				for (u32 addr = meta.addr; addr < meta.addr + meta.sizeInBytes; addr += 4) {
 					MIPSOpcode opcode = Memory::Read_Instruction(addr);
-					if (MIPSGetInfo(opcode) & flags) {
+					MIPSInfo info = MIPSGetInfo(opcode);
+					if ((info & flags) && !(info & antiFlags)) {
 						blockList_.push_back(i);
 						break;
 					}
diff --git a/UI/JitCompareScreen.h b/UI/JitCompareScreen.h
index b416f5b874..b3af60d9ff 100644
--- a/UI/JitCompareScreen.h
+++ b/UI/JitCompareScreen.h
@@ -46,7 +46,7 @@ private:
 	};
 	ViewMode viewMode_ = ViewMode::BLOCK_LIST;
 	ListType listType_ = ListType::ALL_BLOCKS;
-	ListSort listSort_ = ListSort::BLOCK_LENGTH_DESC;
+	ListSort listSort_ = ListSort::TIME_SPENT;
 
 	int currentBlock_ = -1;  // For DISASM mode
 	int64_t sumTotalNanos_ = 0;