Restore "MSL writer: make signed int overflow defined behaviour"

This reverts commit e33b0baa08.

Added tests/expressions/literals/intmin.wgsl test.

Bug: tint:124
Change-Id: I3d46f939ff20fa377ddb5fcb52f9afe728b8e430
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60441
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>

test/ptr_ref/load/global/i32.spvasm.expected.msl

@@ -3,7 +3,7 @@
 using namespace metal;
 void main_1(thread int* const tint_symbol_1) {
   int const x_9 = *(tint_symbol_1);
-  int const x_11 = (x_9 + 1);
+  int const x_11 = as_type<int>((as_type<uint>(x_9) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/global/i32.wgsl.expected.msl

@@ -4,7 +4,7 @@ using namespace metal;
 kernel void tint_symbol() {
   thread int tint_symbol_1 = 0;
   int const i = tint_symbol_1;
-  int const use = (i + 1);
+  int const use = as_type<int>((as_type<uint>(i) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/local/i32.spvasm.expected.msl

@@ -5,7 +5,7 @@ void main_1() {
   int i = 0;
   i = 123;
   int const x_10 = i;
-  int const x_12 = (x_10 + 1);
+  int const x_12 = as_type<int>((as_type<uint>(x_10) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/local/i32.wgsl.expected.msl

@@ -3,7 +3,7 @@
 using namespace metal;
 kernel void tint_symbol() {
   int i = 123;
-  int const use = (i + 1);
+  int const use = as_type<int>((as_type<uint>(i) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/local/ptr_function.wgsl.expected.msl

@@ -3,7 +3,7 @@
 using namespace metal;
 kernel void tint_symbol() {
   int i = 123;
-  int const use = (i + 1);
+  int const use = as_type<int>((as_type<uint>(i) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/local/ptr_private.wgsl.expected.msl

@@ -3,7 +3,7 @@
 using namespace metal;
 kernel void tint_symbol() {
   thread int tint_symbol_1 = 123;
-  int const use = (tint_symbol_1 + 1);
+  int const use = as_type<int>((as_type<uint>(tint_symbol_1) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/local/ptr_storage.wgsl.expected.msl

@@ -6,7 +6,7 @@ struct S {
 };
 
 kernel void tint_symbol(device S& v [[buffer(0)]]) {
-  int const use = (v.a + 1);
+  int const use = as_type<int>((as_type<uint>(v.a) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/local/ptr_uniform.wgsl.expected.msl

@@ -6,7 +6,7 @@ struct S {
 };
 
 kernel void tint_symbol(constant S& v [[buffer(0)]]) {
-  int const use = (v.a + 1);
+  int const use = as_type<int>((as_type<uint>(v.a) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/local/ptr_workgroup.wgsl.expected.msl

@@ -8,7 +8,7 @@ kernel void tint_symbol(uint local_invocation_index [[thread_index_in_threadgrou
   }
   threadgroup_barrier(mem_flags::mem_threadgroup);
   tint_symbol_2 = 123;
-  int const use = (tint_symbol_2 + 1);
+  int const use = as_type<int>((as_type<uint>(tint_symbol_2) + as_type<uint>(1)));
   return;
 }
 

test/ptr_ref/load/param/ptr.spvasm.expected.msl

@@ -3,7 +3,7 @@
 using namespace metal;
 int func(int value, thread int* const pointer) {
   int const x_9 = *(pointer);
-  return (value + x_9);
+  return as_type<int>((as_type<uint>(value) + as_type<uint>(x_9)));
 }
 
 void main_1() {

test/ptr_ref/load/param/ptr.wgsl.expected.msl

@@ -2,7 +2,7 @@
 
 using namespace metal;
 int func(int value, thread int* const pointer) {
-  return (value + *(pointer));
+  return as_type<int>((as_type<uint>(value) + as_type<uint>(*(pointer))));
 }
 
 kernel void tint_symbol() {

test/ptr_ref/store/global/i32.spvasm.expected.msl

@@ -3,7 +3,7 @@
 using namespace metal;
 void main_1(thread int* const tint_symbol_1) {
   *(tint_symbol_1) = 123;
-  *(tint_symbol_1) = ((100 + 20) + 3);
+  *(tint_symbol_1) = as_type<int>((as_type<uint>(as_type<int>((as_type<uint>(100) + as_type<uint>(20)))) + as_type<uint>(3)));
   return;
 }
 

test/ptr_ref/store/global/i32.wgsl.expected.msl

@@ -4,7 +4,7 @@ using namespace metal;
 kernel void tint_symbol() {
   thread int tint_symbol_1 = 0;
   tint_symbol_1 = 123;
-  tint_symbol_1 = ((100 + 20) + 3);
+  tint_symbol_1 = as_type<int>((as_type<uint>(as_type<int>((as_type<uint>(100) + as_type<uint>(20)))) + as_type<uint>(3)));
   return;
 }
 

test/ptr_ref/store/local/i32.spvasm.expected.msl

@@ -5,7 +5,7 @@ void main_1() {
   int i = 0;
   i = 123;
   i = 123;
-  i = ((100 + 20) + 3);
+  i = as_type<int>((as_type<uint>(as_type<int>((as_type<uint>(100) + as_type<uint>(20)))) + as_type<uint>(3)));
   return;
 }
 

test/ptr_ref/store/local/i32.wgsl.expected.msl

@@ -4,7 +4,7 @@ using namespace metal;
 kernel void tint_symbol() {
   int i = 123;
   i = 123;
-  i = ((100 + 20) + 3);
+  i = as_type<int>((as_type<uint>(as_type<int>((as_type<uint>(100) + as_type<uint>(20)))) + as_type<uint>(3)));
   return;
 }