diff --git a/Common/Vulkan/SPIRVDisasm.cpp b/Common/Vulkan/SPIRVDisasm.cpp
index 4c6e78de41..4d7a24c2cb 100644
--- a/Common/Vulkan/SPIRVDisasm.cpp
+++ b/Common/Vulkan/SPIRVDisasm.cpp
@@ -468,7 +468,8 @@ bool DisassembleSPIRV(std::vector<uint32_t> spirv, std::string *output) {
 		uint32_t d = spirv[i];
 		int wordCount = d >> 16;
 		int opcode = d & 0xFFFF;
-		const OpInfo &op = opInfo[opcode];
+		// Force to a valid index in the array.
+		const OpInfo &op = opInfo[opcode >= (int)ARRAY_SIZE(opInfo) ? 0 : opcode];
 		int target = (i < (int)spirv.size() - 1) ? spirv[(i + 1)] : 0;  // Not always, but used often enough that we get it here.
 		int source, source2, resType;
 		std::string name;
diff --git a/Core/HLE/sceKernelTime.cpp b/Core/HLE/sceKernelTime.cpp
index b74772df3b..c656a3f8ce 100644
--- a/Core/HLE/sceKernelTime.cpp
+++ b/Core/HLE/sceKernelTime.cpp
@@ -176,7 +176,7 @@ u32 sceKernelLibcGettimeofday(u32 timeAddr, u32 tzAddr)
 std::string KernelTimeNowFormatted() {
 	time_t emulatedTime = (time_t)start_time + (u32)(CoreTiming::GetGlobalTimeUs() / 1000000ULL);
 	tm* timePtr = localtime(&emulatedTime);
-	bool DST = timePtr->tm_isdst;
+	bool DST = timePtr->tm_isdst != 0;
 	u8 seconds = timePtr->tm_sec;
 	u8 minutes = timePtr->tm_min;
 	u8 hours = timePtr->tm_hour;
@@ -187,4 +187,4 @@ std::string KernelTimeNowFormatted() {
 	u16 years = timePtr->tm_year + 1900;
 	std::string timestamp = StringFromFormat("%04d-%02d-%02d_%02d-%02d-%02d", years, months, days, hours, minutes, seconds);
 	return timestamp;
-}
\ No newline at end of file
+}
diff --git a/Core/TextureReplacer.cpp b/Core/TextureReplacer.cpp
index b46f429f90..540aad3adf 100644
--- a/Core/TextureReplacer.cpp
+++ b/Core/TextureReplacer.cpp
@@ -171,7 +171,7 @@ void TextureReplacer::ParseHashRange(const std::string &key, const std::string &
 		return;
 	}
 
-	const u64 rangeKey = ((u64)addr << 32) | (fromW << 16) | fromH;
+	const u64 rangeKey = ((u64)addr << 32) | ((u64)fromW << 16) | fromH;
 	hashranges_[rangeKey] = WidthHeightPair(toW, toH);
 }
 
@@ -511,7 +511,7 @@ std::string TextureReplacer::HashName(u64 cachekey, u32 hash, int level) {
 }
 
 bool TextureReplacer::LookupHashRange(u32 addr, int &w, int &h) {
-	const u64 rangeKey = ((u64)addr << 32) | (w << 16) | h;
+	const u64 rangeKey = ((u64)addr << 32) | ((u64)w << 16) | h;
 	auto range = hashranges_.find(rangeKey);
 	if (range != hashranges_.end()) {
 		const WidthHeightPair &wh = range->second;
diff --git a/GPU/Common/ShaderTranslation.cpp b/GPU/Common/ShaderTranslation.cpp
index 1a50efbaba..0ca126281b 100644
--- a/GPU/Common/ShaderTranslation.cpp
+++ b/GPU/Common/ShaderTranslation.cpp
@@ -156,7 +156,6 @@ bool ConvertToVulkanGLSL(std::string *dest, TranslatedShaderMetadata *destMetada
 	std::string line;
 	std::stringstream instream(src);
 	while (std::getline(instream, line)) {
-		char buffer[256];
 		int vecSize, num;
 		if (line.find("uniform bool") != std::string::npos) {
 			continue;
diff --git a/GPU/Common/StencilCommon.cpp b/GPU/Common/StencilCommon.cpp
index b38faffb47..29af15c020 100644
--- a/GPU/Common/StencilCommon.cpp
+++ b/GPU/Common/StencilCommon.cpp
@@ -1,4 +1,19 @@
-#pragma once
+// Copyright (c) 2014- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
 #include "GPU/Common/StencilCommon.h"
 
diff --git a/ext/native/gfx_es2/draw_text_android.cpp b/ext/native/gfx_es2/draw_text_android.cpp
index 922e578a6e..19dc593255 100644
--- a/ext/native/gfx_es2/draw_text_android.cpp
+++ b/ext/native/gfx_es2/draw_text_android.cpp
@@ -174,7 +174,7 @@ void TextDrawerAndroid::DrawString(DrawBuffer &target, const char *str, float x,
 		entry->lastUsedFrame = frameCount_;
 		draw_->BindTexture(0, entry->texture);
 	} else {
-		double size;
+		double size = 0.0;
 		auto iter = fontMap_.find(fontHash_);
 		if (iter != fontMap_.end()) {
 			size = iter->second.size;