tint: add e2e test for crbug.com/tint/1538

Bug: tint:1538
Change-Id: I3fecee57054813cbb7bc6b1343f373d504f631f7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104021
Reviewed-by: Ben Clayton <bclayton@google.com>

test/tint/bug/tint/1538.wgsl

@@ -0,0 +1,28 @@
+@group(0)
+@binding(1)
+var<storage, read_write> buf: array<u32, 1>;
+
+fn g() -> i32 {
+    return 0;
+}
+
+fn f() ->  i32 {
+    loop {
+        g();
+        break;
+    }
+    let o = g();
+    return 0;
+}
+
+@compute
+@workgroup_size(1)
+fn main() {
+    loop {
+        if (buf[0] == 0u) {
+            break;
+        }
+        var s = f();
+        buf[0] = 0u;
+    }
+}

test/tint/bug/tint/1538.wgsl.expected.dxc.hlsl

@@ -0,0 +1,26 @@
+RWByteAddressBuffer buf : register(u1, space0);
+
+int g() {
+  return 0;
+}
+
+int f() {
+  [loop] while (true) {
+    g();
+    break;
+  }
+  const int o = g();
+  return 0;
+}
+
+[numthreads(1, 1, 1)]
+void main() {
+  [loop] while (true) {
+    if ((buf.Load(0u) == 0u)) {
+      break;
+    }
+    int s = f();
+    buf.Store(0u, asuint(0u));
+  }
+  return;
+}

test/tint/bug/tint/1538.wgsl.expected.fxc.hlsl

@@ -0,0 +1,31 @@
+SKIP: FAILED
+
+RWByteAddressBuffer buf : register(u1, space0);
+
+int g() {
+  return 0;
+}
+
+int f() {
+  [loop] while (true) {
+    g();
+    break;
+  }
+  const int o = g();
+  return 0;
+}
+
+[numthreads(1, 1, 1)]
+void main() {
+  [loop] while (true) {
+    if ((buf.Load(0u) == 0u)) {
+      break;
+    }
+    int s = f();
+    buf.Store(0u, asuint(0u));
+  }
+  return;
+}
+FXC validation failure:
+C:\src\dawn\test\tint\Shader@0x0000025FB94834E0(8,10-21): error X3531: can't unroll loops marked with loop attribute
+

test/tint/bug/tint/1538.wgsl.expected.glsl

@@ -0,0 +1,34 @@
+#version 310 es
+
+layout(binding = 1, std430) buffer buf_block_ssbo {
+  uint inner[1];
+} buf;
+
+int g() {
+  return 0;
+}
+
+int f() {
+  while (true) {
+    g();
+    break;
+  }
+  int o = g();
+  return 0;
+}
+
+void tint_symbol() {
+  while (true) {
+    if ((buf.inner[0] == 0u)) {
+      break;
+    }
+    int s = f();
+    buf.inner[0] = 0u;
+  }
+}
+
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+void main() {
+  tint_symbol();
+  return;
+}

test/tint/bug/tint/1538.wgsl.expected.msl

@@ -0,0 +1,40 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+template<typename T, size_t N>
+struct tint_array {
+    const constant T& operator[](size_t i) const constant { return elements[i]; }
+    device T& operator[](size_t i) device { return elements[i]; }
+    const device T& operator[](size_t i) const device { return elements[i]; }
+    thread T& operator[](size_t i) thread { return elements[i]; }
+    const thread T& operator[](size_t i) const thread { return elements[i]; }
+    threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
+    const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
+    T elements[N];
+};
+
+int g() {
+  return 0;
+}
+
+int f() {
+  while (true) {
+    g();
+    break;
+  }
+  int const o = g();
+  return 0;
+}
+
+kernel void tint_symbol(device tint_array<uint, 1>* tint_symbol_1 [[buffer(0)]]) {
+  while (true) {
+    if (((*(tint_symbol_1))[0] == 0u)) {
+      break;
+    }
+    int s = f();
+    (*(tint_symbol_1))[0] = 0u;
+  }
+  return;
+}
+

test/tint/bug/tint/1538.wgsl.expected.spvasm

@@ -0,0 +1,82 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 41
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %main "main"
+               OpExecutionMode %main LocalSize 1 1 1
+               OpName %buf_block "buf_block"
+               OpMemberName %buf_block 0 "inner"
+               OpName %buf "buf"
+               OpName %g "g"
+               OpName %f "f"
+               OpName %main "main"
+               OpName %s "s"
+               OpDecorate %buf_block Block
+               OpMemberDecorate %buf_block 0 Offset 0
+               OpDecorate %_arr_uint_uint_1 ArrayStride 4
+               OpDecorate %buf DescriptorSet 0
+               OpDecorate %buf Binding 1
+       %uint = OpTypeInt 32 0
+     %uint_1 = OpConstant %uint 1
+%_arr_uint_uint_1 = OpTypeArray %uint %uint_1
+  %buf_block = OpTypeStruct %_arr_uint_uint_1
+%_ptr_StorageBuffer_buf_block = OpTypePointer StorageBuffer %buf_block
+        %buf = OpVariable %_ptr_StorageBuffer_buf_block StorageBuffer
+        %int = OpTypeInt 32 1
+          %7 = OpTypeFunction %int
+         %11 = OpConstantNull %int
+       %void = OpTypeVoid
+         %20 = OpTypeFunction %void
+     %uint_0 = OpConstant %uint 0
+%_ptr_StorageBuffer_uint = OpTypePointer StorageBuffer %uint
+         %32 = OpConstantNull %uint
+       %bool = OpTypeBool
+%_ptr_Function_int = OpTypePointer Function %int
+          %g = OpFunction %int None %7
+         %10 = OpLabel
+               OpReturnValue %11
+               OpFunctionEnd
+          %f = OpFunction %int None %7
+         %13 = OpLabel
+               OpBranch %14
+         %14 = OpLabel
+               OpLoopMerge %15 %16 None
+               OpBranch %17
+         %17 = OpLabel
+         %18 = OpFunctionCall %int %g
+               OpBranch %15
+         %16 = OpLabel
+               OpBranch %14
+         %15 = OpLabel
+         %19 = OpFunctionCall %int %g
+               OpReturnValue %11
+               OpFunctionEnd
+       %main = OpFunction %void None %20
+         %23 = OpLabel
+          %s = OpVariable %_ptr_Function_int Function %11
+               OpBranch %24
+         %24 = OpLabel
+               OpLoopMerge %25 %26 None
+               OpBranch %27
+         %27 = OpLabel
+         %30 = OpAccessChain %_ptr_StorageBuffer_uint %buf %uint_0 %11
+         %31 = OpLoad %uint %30
+         %33 = OpIEqual %bool %31 %32
+               OpSelectionMerge %35 None
+               OpBranchConditional %33 %36 %35
+         %36 = OpLabel
+               OpBranch %25
+         %35 = OpLabel
+         %37 = OpFunctionCall %int %f
+               OpStore %s %37
+         %40 = OpAccessChain %_ptr_StorageBuffer_uint %buf %uint_0 %11
+               OpStore %40 %32
+               OpBranch %26
+         %26 = OpLabel
+               OpBranch %24
+         %25 = OpLabel
+               OpReturn
+               OpFunctionEnd

test/tint/bug/tint/1538.wgsl.expected.wgsl

@@ -0,0 +1,25 @@
+@group(0) @binding(1) var<storage, read_write> buf : array<u32, 1>;
+
+fn g() -> i32 {
+  return 0;
+}
+
+fn f() -> i32 {
+  loop {
+    g();
+    break;
+  }
+  let o = g();
+  return 0;
+}
+
+@compute @workgroup_size(1)
+fn main() {
+  loop {
+    if ((buf[0] == 0u)) {
+      break;
+    }
+    var s = f();
+    buf[0] = 0u;
+  }
+}

test/tint/bug/tint/1666.wgsl.expected.fxc.hlsl

@@ -1,4 +1,4 @@
-SKIP: FAILED
+SKIP: FAILED - crbug.com/tint/1666
 
 void tint_symbol() {
   const int idx = 3;