Replace pointer-access.spv snapshot test with WGSL source. (#1450)

The original pointer access test used SPIR-V for its input because WGSL didn't
have a working pointer indirection operator at the time. Now that it does, we
can just write this test in WGSL directly.

Fixes #1432.

tests/in/pointer-access.param.ron

@@ -1,7 +0,0 @@
-(
-	spv: (
-		version: (1, 0),
-		debug: true,
-		adjust_coordinate_space: true,
-	),
-)

tests/in/pointers.param.ron

@@ -1,4 +1,5 @@
 (
+        index_bounds_check_policy: ReadZeroSkipWrite,
 	spv: (
 		version: (1, 2),
 		debug: true,

tests/in/pointers.wgsl

@@ -3,3 +3,14 @@ fn f() {
    let px = &v.x;
    *px = 10;
 }
+
+[[block]]
+struct DynamicArray {
+    array: array<u32>;
+};
+
+fn index_dynamic_array(p: ptr<workgroup, DynamicArray>, i: i32, v: u32) -> u32 {
+   let old = (*p).array[i];
+   (*p).array[i] = v;
+   return old;
+}

tests/out/spv/pointers.spvasm

@@ -1,29 +1,71 @@
 ; SPIR-V
 ; Version: 1.2
 ; Generator: rspirv
-; Bound: 16
+; Bound: 42
 OpCapability Shader
 OpCapability Linkage
 %1 = OpExtInstImport "GLSL.std.450"
 OpMemoryModel Logical GLSL450
 OpSource GLSL 450
-OpName %6 "v"
+OpMemberName %8 0 "array"
-OpName %9 "f"
+OpName %8 "DynamicArray"
+OpName %10 "v"
+OpName %13 "f"
+OpName %23 "index_dynamic_array"
+OpDecorate %7 ArrayStride 4
+OpDecorate %8 Block
+OpMemberDecorate %8 0 Offset 0
 %2 = OpTypeVoid
 %4 = OpTypeInt 32 1
 %3 = OpConstant  %4  10
 %5 = OpTypeVector %4 2
-%7 = OpTypePointer Function %5
+%6 = OpTypeInt 32 0
-%10 = OpTypeFunction %2
+%7 = OpTypeRuntimeArray %6
-%12 = OpTypePointer Function %4
+%8 = OpTypeStruct %7
-%14 = OpTypeInt 32 0
+%9 = OpTypePointer Workgroup %8
-%13 = OpConstant  %14  0
+%11 = OpTypePointer Function %5
-%9 = OpFunction  %2  None %10
+%14 = OpTypeFunction %2
-%8 = OpLabel
+%16 = OpTypePointer Function %4
-%6 = OpVariable  %7  Function
+%17 = OpConstant  %6  0
-OpBranch %11
+%24 = OpTypeFunction %6 %9 %4 %6
-%11 = OpLabel
+%26 = OpTypePointer Workgroup %7
-%15 = OpAccessChain  %12  %6 %13
+%27 = OpTypePointer Workgroup %6
-OpStore %15 %3
+%30 = OpTypeBool
+%32 = OpConstantNull  %6
+%13 = OpFunction  %2  None %14
+%12 = OpLabel
+%10 = OpVariable  %11  Function
+OpBranch %15
+%15 = OpLabel
+%18 = OpAccessChain  %16  %10 %17
+OpStore %18 %3
 OpReturn
 OpFunctionEnd
+%23 = OpFunction  %6  None %24
+%20 = OpFunctionParameter  %9
+%21 = OpFunctionParameter  %4
+%22 = OpFunctionParameter  %6
+%19 = OpLabel
+OpBranch %25
+%25 = OpLabel
+%28 = OpArrayLength  %6  %20 0
+%29 = OpULessThan  %30  %21 %28
+OpSelectionMerge %33 None
+OpBranchConditional %29 %34 %33
+%34 = OpLabel
+%31 = OpAccessChain  %27  %20 %17 %21
+%35 = OpLoad  %6  %31
+OpBranch %33
+%33 = OpLabel
+%36 = OpPhi  %6  %32 %25 %35 %34
+%37 = OpArrayLength  %6  %20 0
+%38 = OpULessThan  %30  %21 %37
+OpSelectionMerge %40 None
+OpBranchConditional %38 %41 %40
+%41 = OpLabel
+%39 = OpAccessChain  %27  %20 %17 %21
+OpStore %39 %22
+OpBranch %40
+%40 = OpLabel
+OpReturnValue %36
+OpFunctionEnd

tests/out/wgsl/pointers.wgsl

@@ -1,3 +1,8 @@
+[[block]]
+struct DynamicArray {
+    array1: [[stride(4)]] array<u32>;
+};
+
 fn f() {
     var v: vec2<i32>;
 
@@ -6,3 +11,9 @@ fn f() {
     return;
 }
 
+fn index_dynamic_array(p: ptr<workgroup, DynamicArray>, i: i32, v1: u32) -> u32 {
+    let old: u32 = (*p).array1[i];
+    (*p).array1[i] = v1;
+    return old;
+}
+

tests/snapshots.rs

@@ -598,12 +598,6 @@ fn convert_spv_inverse_hyperbolic_trig_functions() {
     );
 }
 
-#[cfg(all(feature = "spv-in", feature = "spv-out"))]
-//#[test] //TODO: https://github.com/gfx-rs/naga/issues/1432
-fn _convert_spv_pointer_access() {
-    convert_spv("pointer-access", true, Targets::SPIRV);
-}
-
 #[cfg(feature = "glsl-in")]
 #[allow(unused_variables)]
 #[test]