diff --git a/lib/std/core/env.c3 b/lib/std/core/env.c3
index 32748c8b2..41ae17d41 100644
--- a/lib/std/core/env.c3
+++ b/lib/std/core/env.c3
@@ -11,6 +11,14 @@ enum CompilerOptLevel
     O3
 }
 
+enum MemoryEnvironment
+{
+	NORMAL,
+	SMALL,
+	TINY,
+	NONE
+}
+
 enum OsType
 {
 	UNKNOWN,
@@ -51,9 +59,9 @@ enum OsType
 	EMSCRIPTEN,
 }
 
-const OsType OS_TYPE = (OsType)($$OS_TYPE);
+const OsType OS_TYPE = (OsType)$$OS_TYPE;
 const bool COMPILER_LIBC_AVAILABLE = $$COMPILER_LIBC_AVAILABLE;
-const CompilerOptLevel COMPILER_OPT_LEVEL = (CompilerOptLevel)($$COMPILER_OPT_LEVEL);
+const CompilerOptLevel COMPILER_OPT_LEVEL = (CompilerOptLevel)$$COMPILER_OPT_LEVEL;
 const bool BIG_ENDIAN = $$PLATFORM_BIG_ENDIAN;
 const bool I128_NATIVE_SUPPORT = $$PLATFORM_I128_SUPPORTED;
 const bool F16_SUPPORT = $$PLATFORM_F16_SUPPORTED;
@@ -62,7 +70,7 @@ const bool COMPILER_SAFE_MODE = $$COMPILER_SAFE_MODE;
 const usz LLVM_VERSION = $$LLVM_VERSION;
 const bool BENCHMARKING = $$BENCHMARKING;
 const bool TESTING = $$TESTING;
-const usz TEMP_ALLOCATOR_SIZE = 128 * 1024;
+const MemoryEnvironment MEMORY_ENV = (MemoryEnvironment)$$MEMORY_ENVIRONMENT;
 
 macro bool os_is_posix()
 {
@@ -86,4 +94,5 @@ macro bool os_is_posix()
 		$echo("Assuming non-Posix environment");
 		return false;
 	$endswitch;
-}
\ No newline at end of file
+}
+
diff --git a/lib/std/core/mem.c3 b/lib/std/core/mem.c3
index 363d1117e..1e7f5cee6 100644
--- a/lib/std/core/mem.c3
+++ b/lib/std/core/mem.c3
@@ -275,7 +275,16 @@ macro TempAllocator* temp_allocator()
 {
 	if (!thread_temp_allocator)
 	{
-		thread_temp_allocator = allocator::new_temp(env::TEMP_ALLOCATOR_SIZE, allocator::LIBC_ALLOCATOR)!!;
+		$switch (env::MEMORY_ENV):
+		$case NORMAL:
+			thread_temp_allocator = allocator::new_temp(1024 * 256, allocator::LIBC_ALLOCATOR)!!;
+		$case SMALL:
+			thread_temp_allocator = allocator::new_temp(1024 * 16, allocator::LIBC_ALLOCATOR)!!;
+		$case TINY:
+			thread_temp_allocator = allocator::new_temp(1024 * 4, allocator::LIBC_ALLOCATOR)!!;
+		$case NONE:
+			unreachable("Temp allocator must explicitly created when memory-env is set to 'none'.");
+		$endswitch;
 	}
 	return thread_temp_allocator;
 }
diff --git a/src/build/build_options.c b/src/build/build_options.c
index 9c5a04b30..5ad6074ff 100644
--- a/src/build/build_options.c
+++ b/src/build/build_options.c
@@ -131,6 +131,7 @@ static void usage(void)
 	OUTPUT("");
 	OUTPUT("  --reloc=<option>          - Relocation model: none, pic, PIC, pie, PIE.");
 	OUTPUT("  --x86vec=<option>         - Set max level of vector instructions: none, native, mmx, sse, avx, avx512.");
+	OUTPUT("  --memory-env=<option>     - Set the memory environment: normal, small, tiny, none.");
 	OUTPUT("");
 	OUTPUT("  --debug-stats             - Print debug statistics.");
 #ifndef NDEBUG
@@ -546,6 +547,11 @@ static void parse_option(BuildOptions *options)
 				options->x86_vector_capability = (X86VectorCapability)parse_multi_option(argopt, 6, vector_capability);
 				return;
 			}
+			if ((argopt = match_argopt("memory-env")))
+			{
+				options->memory_environment = (MemoryEnvironment )parse_multi_option(argopt, 4, memory_environment);
+				return;
+			}
 			if ((argopt = match_argopt("reloc")))
 			{
 				options->reloc_model = (RelocModel)parse_multi_option(argopt, 5, reloc_models);
@@ -839,6 +845,7 @@ BuildOptions parse_arguments(int argc, const char *argv[])
 		.reloc_model = RELOC_DEFAULT,
 		.backend = BACKEND_LLVM,
 		.x86_vector_capability = X86VECTOR_DEFAULT,
+		.memory_environment = MEMORY_ENV_NOT_SET,
 		.win.crt_linking = WIN_CRT_DEFAULT,
 		.files = NULL,
 		.build_dir = NULL,
diff --git a/src/build/build_options.h b/src/build/build_options.h
index 1a2ee7357..7bfab106a 100644
--- a/src/build/build_options.h
+++ b/src/build/build_options.h
@@ -147,6 +147,7 @@ typedef enum
 	X86VECTOR_NATIVE = 5,
 } X86VectorCapability;
 
+
 static const char *vector_capability[6] = {
 		[X86VECTOR_NONE] = "none",
 		[X86VECTOR_MMX] = "mmx",
@@ -156,6 +157,22 @@ static const char *vector_capability[6] = {
 		[X86VECTOR_NATIVE] = "native"
 };
 
+typedef enum
+{
+	MEMORY_ENV_NOT_SET = -1,
+	MEMORY_ENV_NORMAL = 0,
+	MEMORY_ENV_SMALL = 1,
+	MEMORY_ENV_TINY = 2,
+	MEMORY_ENV_NONE = 3,
+} MemoryEnvironment;
+
+static const char *memory_environment[6] = {
+		[MEMORY_ENV_NORMAL] = "normal",
+		[MEMORY_ENV_SMALL] = "small",
+		[MEMORY_ENV_TINY] = "tiny",
+		[MEMORY_ENV_NONE] = "none",
+};
+
 typedef enum
 {
 	WIN_CRT_DEFAULT = -1,
@@ -284,6 +301,7 @@ typedef struct BuildOptions_
 	const char *obj_out;
 	RelocModel reloc_model;
 	X86VectorCapability x86_vector_capability;
+	MemoryEnvironment memory_environment;
 	bool print_keywords;
 	bool print_attributes;
 	bool print_builtins;
@@ -365,6 +383,7 @@ typedef struct
 	bool no_entry;
 	int build_threads;
 	OptimizationLevel optimization_level;
+	MemoryEnvironment memory_environment;
 	SizeOptimizationLevel size_optimization_level;
 	bool single_module;
 	DebugInfo debug_info;
diff --git a/src/build/builder.c b/src/build/builder.c
index 8f65a44b2..bc9adbe18 100644
--- a/src/build/builder.c
+++ b/src/build/builder.c
@@ -196,6 +196,10 @@ static void update_build_target_from_options(BuildTarget *target, BuildOptions *
 	{
 		target->feature.safe_mode = options->safe_mode == 1;
 	}
+	if (options->memory_environment != MEMORY_ENV_NOT_SET)
+	{
+		target->memory_environment = options->memory_environment;
+	}
 	if (options->debug_info_override != DEBUG_INFO_NOT_SET)
 	{
 		target->debug_info = options->debug_info_override;
@@ -301,6 +305,7 @@ void init_default_build_target(BuildTarget *target, BuildOptions *options)
 		.source_dirs = options->files,
 		.name = options->output_name,
 		.optimization_level = OPTIMIZATION_DEFAULT,
+		.memory_environment = MEMORY_ENV_NORMAL,
 		.size_optimization_level = SIZE_OPTIMIZATION_NONE,
 		.symtab_size = options->symtab_size ? options->symtab_size : DEFAULT_SYMTAB_SIZE,
 		.switchrange_max_size = DEFAULT_SWITCHRANGE_MAX_SIZE,
diff --git a/src/build/project.c b/src/build/project.c
index 479cb38f2..e6ed15480 100644
--- a/src/build/project.c
+++ b/src/build/project.c
@@ -20,6 +20,7 @@ const char *project_default_keys[] = {
 		"link-args",
 		"linked-libraries",
 		"macossdk",
+		"memory-env",
 		"no-entry",
 		"nolibc",
 		"nostdlib",
@@ -62,6 +63,7 @@ const char* project_target_keys[] = {
 		"link-args-override",
 		"link-args-add",
 		"macossdk",
+		"memory-env",
 		"nolibc",
 		"nostdlib",
 		"panicfn",
@@ -289,6 +291,9 @@ static void load_into_build_target(JSONObject *json, const char *type, BuildTarg
 	DebugInfo info = get_valid_string_setting(json, "debug-info", type, debug_infos, 0, 3, "one of 'full' 'line-table' or 'none'.");
 	if (info > -1) target->debug_info = info;
 
+	MemoryEnvironment env = get_valid_string_setting(json, "memory-env", type, memory_environment, 0, 4, "one of 'normal', 'small', 'tiny' or 'none'.");
+	if (env > -1) target->memory_environment = env;
+
 	// Symtab
 	long symtab_size = get_valid_integer(json, "symtab", type, false);
 	if (symtab_size > 0)
@@ -409,6 +414,7 @@ static void project_add_targets(Project *project, JSONObject *project_data)
 
 	BuildTarget default_target = {
 			.optimization_level = OPTIMIZATION_DEFAULT,
+			.memory_environment = MEMORY_ENV_NORMAL,
 			.size_optimization_level = SIZE_OPTIMIZATION_NONE,
 			.arch_os_target = ARCH_OS_TARGET_DEFAULT,
 			.debug_info = DEBUG_INFO_NONE,
diff --git a/src/compiler/compiler.c b/src/compiler/compiler.c
index 732a861da..c2bdb6665 100644
--- a/src/compiler/compiler.c
+++ b/src/compiler/compiler.c
@@ -551,9 +551,11 @@ static void setup_int_define(const char *id, uint64_t i, Type *type)
 {
 	TokenType token_type = TOKEN_CONST_IDENT;
 	id = symtab_add(id, (uint32_t) strlen(id), fnv1a(id, (uint32_t) strlen(id)), &token_type);
-	assert(type_is_integer(type));
-	Expr *expr = expr_new_const_int(INVALID_SPAN, type, i, true);
-	if (expr_const_will_overflow(&expr->const_expr, type->type_kind))
+	Type *flat = type_flatten(type);
+	assert(type_is_integer(flat));
+	Expr *expr = expr_new_const_int(INVALID_SPAN, flat, i, true);
+	expr->type = type;
+	if (expr_const_will_overflow(&expr->const_expr, flat->type_kind))
 	{
 		error_exit("Integer define %s overflow.", id);
 	}
@@ -745,6 +747,7 @@ static int jump_buffer_size()
 	}
 	UNREACHABLE
 }
+
 void compile()
 {
 	symtab_init(active_target.symtab_size);
@@ -770,6 +773,7 @@ void compile()
 	setup_bool_define("PLATFORM_I128_SUPPORTED", platform_target.int128);
 	setup_bool_define("PLATFORM_F128_SUPPORTED", platform_target.float128);
 	setup_bool_define("PLATFORM_F16_SUPPORTED", platform_target.float16);
+	setup_int_define("MEMORY_ENVIRONMENT", (uint64_t)active_target.memory_environment, type_int);
 	setup_bool_define("COMPILER_LIBC_AVAILABLE", !active_target.no_libc);
 	setup_int_define("COMPILER_OPT_LEVEL", (uint64_t)active_target.optimization_level, type_int);
 	setup_int_define("OS_TYPE", (uint64_t)platform_target.os, type_int);
diff --git a/src/version.h b/src/version.h
index 195f2d729..b3244c6af 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define COMPILER_VERSION "0.4.24"
\ No newline at end of file
+#define COMPILER_VERSION "0.4.25"
\ No newline at end of file
diff --git a/test/test_suite/stdlib/map.c3t b/test/test_suite/stdlib/map.c3t
index 680a287e6..824d0cd67 100644
--- a/test/test_suite/stdlib/map.c3t
+++ b/test/test_suite/stdlib/map.c3t
@@ -350,7 +350,7 @@ voiderr64:                                        ; preds = %after_check63, %voi
   br i1 %not, label %if.then, label %if.exit
 
 if.then:                                          ; preds = %voiderr64
-  %79 = call i64 @std_core_mem_allocator_new_temp(ptr %retparam65, i64 131072, ptr @std_core_mem_allocator__SYSTEM_ALLOCATOR)
+  %79 = call i64 @std_core_mem_allocator_new_temp(ptr %retparam65, i64 262144, ptr @std_core_mem_allocator__SYSTEM_ALLOCATOR)
   %not_err66 = icmp eq i64 %79, 0
   br i1 %not_err66, label %after_check67, label %assign_optional
 
@@ -364,7 +364,7 @@ after_check67:                                    ; preds = %if.then
 
 panic_block:                                      ; preds = %assign_optional
   %81 = load ptr, ptr @std_core_builtin_panic, align 8
-  call void %81(ptr @.panic_msg, i64 27, ptr @.file, i64 6, ptr @.func, i64 4,
+  call void %81(ptr @.panic_msg,
   unreachable
 
 noerr_block:                                      ; preds = %after_check67
diff --git a/test/test_suite14/stdlib/map.c3t b/test/test_suite14/stdlib/map.c3t
index 578eefe0b..a773a14f9 100644
--- a/test/test_suite14/stdlib/map.c3t
+++ b/test/test_suite14/stdlib/map.c3t
@@ -494,7 +494,7 @@ voiderr97:                                        ; preds = %after_check96, %voi
   br i1 %not, label %if.then, label %if.exit
 
 if.then:                                          ; preds = %voiderr97
-  %158 = call i64 @std_core_mem_allocator_new_temp(%TempAllocator** %retparam98, i64 131072, %Allocator* @std_core_mem_allocator__SYSTEM_ALLOCATOR)
+  %158 = call i64 @std_core_mem_allocator_new_temp(%TempAllocator** %retparam98, i64 262144, %Allocator* @std_core_mem_allocator__SYSTEM_ALLOCATOR)
   %not_err99 = icmp eq i64 %158, 0
   br i1 %not_err99, label %after_check100, label %assign_optional
 
@@ -508,7 +508,7 @@ after_check100:                                   ; preds = %if.then
 
 panic_block:                                      ; preds = %assign_optional
   %160 = load void (i8*, i64, i8*, i64, i8*, i64, i32)*, void (i8*, i64, i8*, i64, i8*, i64, i32)** @std_core_builtin_panic, align 8
-  call void %160(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.panic_msg, i64 0, i64 0), i64 27, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.file, i64 0, i64 0), i64 6, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.func, i64 0, i64 0), i64 4,
+  call void %160(i8* getelementptr inbounds
   unreachable
 
 noerr_block:                                      ; preds = %after_check100