tint: Fix MSL generation of '&' and '|' with booleans

The bitwise-and and bitwise-or binary operators on booleans result in an integer.
Explicitly cast this back to a boolean.

Fixed: tint:1540
Fixed: tint:1541
Change-Id: I395176f291e6080c88b8cff18e14ed6cd1234074
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/90501
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>

test/tint/expressions/binary/bit-and/vec3-vec3/bool.wgsl

@@ -0,0 +1,6 @@
+@stage(compute) @workgroup_size(1)
+fn f() {
+    let a = vec3<bool>(true, true, false);
+    let b = vec3<bool>(true, false, true);
+    let r : vec3<bool> = a & b;
+}

test/tint/expressions/binary/bit-and/vec3-vec3/bool.wgsl.expected.glsl

@@ -0,0 +1,13 @@
+#version 310 es
+
+void f() {
+  bvec3 a = bvec3(true, true, false);
+  bvec3 b = bvec3(true, false, true);
+  bvec3 r = bvec3(uvec3(a) & uvec3(b));
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  f();
+  return;
+}

test/tint/expressions/binary/bit-and/vec3-vec3/bool.wgsl.expected.hlsl

@@ -0,0 +1,7 @@
+[numthreads(1, 1, 1)]
+void f() {
+  const bool3 a = bool3(true, true, false);
+  const bool3 b = bool3(true, false, true);
+  const bool3 r = (a & b);
+  return;
+}

test/tint/expressions/binary/bit-and/vec3-vec3/bool.wgsl.expected.msl

@@ -0,0 +1,10 @@
+#include <metal_stdlib>
+
+using namespace metal;
+kernel void f() {
+  bool3 const a = bool3(true, true, false);
+  bool3 const b = bool3(true, false, true);
+  bool3 const r = (a & b);
+  return;
+}
+

test/tint/expressions/binary/bit-and/vec3-vec3/bool.wgsl.expected.spvasm

@@ -0,0 +1,23 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %f "f"
+               OpExecutionMode %f LocalSize 1 1 1
+               OpName %f "f"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %bool = OpTypeBool
+     %v3bool = OpTypeVector %bool 3
+       %true = OpConstantTrue %bool
+      %false = OpConstantFalse %bool
+          %9 = OpConstantComposite %v3bool %true %true %false
+         %10 = OpConstantComposite %v3bool %true %false %true
+          %f = OpFunction %void None %1
+          %4 = OpLabel
+         %11 = OpLogicalAnd %v3bool %9 %10
+               OpReturn
+               OpFunctionEnd

test/tint/expressions/binary/bit-and/vec3-vec3/bool.wgsl.expected.wgsl

@@ -0,0 +1,6 @@
+@stage(compute) @workgroup_size(1)
+fn f() {
+  let a = vec3<bool>(true, true, false);
+  let b = vec3<bool>(true, false, true);
+  let r : vec3<bool> = (a & b);
+}