tint/test-runner: Split expectations for FXC and DXC

Change tint's `--fxc` flag to take the path of the FXC compiler DLL.
Have tint attempt to validate with both FXC and DXC if `--validate` is
passed.

Fix the 'dirsWithNoPassExpectations' logic which looks like it got
broken with the tint -> dawn merge. It also incorrectly applied
filepath.FromSlash() on windows.

Change-Id: I0f46aa5c21bc48a2abc48402c41f846aff4a8633
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/96800
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>

test/tint/builtins/textureLoad/depth_ms.spvasm.expected.fxc.hlsl

@@ -0,0 +1,61 @@
+Texture2DMS<float4> arg_0 : register(t0, space1);
+static float4 tint_symbol_1 = (0.0f).xxxx;
+
+void textureLoad_6273b1() {
+  float res = 0.0f;
+  const float4 x_17 = float4(arg_0.Load(int3(0, 0, 0), 1).x, 0.0f, 0.0f, 0.0f);
+  res = x_17.x;
+  return;
+}
+
+void tint_symbol_2(float4 tint_symbol) {
+  tint_symbol_1 = tint_symbol;
+  return;
+}
+
+void vertex_main_1() {
+  textureLoad_6273b1();
+  tint_symbol_2((0.0f).xxxx);
+  return;
+}
+
+struct vertex_main_out {
+  float4 tint_symbol_1_1;
+};
+struct tint_symbol_3 {
+  float4 tint_symbol_1_1 : SV_Position;
+};
+
+vertex_main_out vertex_main_inner() {
+  vertex_main_1();
+  const vertex_main_out tint_symbol_4 = {tint_symbol_1};
+  return tint_symbol_4;
+}
+
+tint_symbol_3 vertex_main() {
+  const vertex_main_out inner_result = vertex_main_inner();
+  tint_symbol_3 wrapper_result = (tint_symbol_3)0;
+  wrapper_result.tint_symbol_1_1 = inner_result.tint_symbol_1_1;
+  return wrapper_result;
+}
+
+void fragment_main_1() {
+  textureLoad_6273b1();
+  return;
+}
+
+void fragment_main() {
+  fragment_main_1();
+  return;
+}
+
+void compute_main_1() {
+  textureLoad_6273b1();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  compute_main_1();
+  return;
+}

test/tint/builtins/textureLoad/texture_external_param.wgsl.expected.fxc.hlsl

@@ -0,0 +1,115 @@
+struct GammaTransferParams {
+  float G;
+  float A;
+  float B;
+  float C;
+  float D;
+  float E;
+  float F;
+  uint padding;
+};
+struct ExternalTextureParams {
+  uint numPlanes;
+  uint doYuvToRgbConversionOnly;
+  float3x4 yuvToRgbConversionMatrix;
+  GammaTransferParams gammaDecodeParams;
+  GammaTransferParams gammaEncodeParams;
+  float3x3 gamutConversionMatrix;
+};
+
+Texture2D<float4> ext_tex_plane_1 : register(t1, space1);
+cbuffer cbuffer_ext_tex_params : register(b2, space1) {
+  uint4 ext_tex_params[11];
+};
+Texture2D<float4> arg_0 : register(t0, space1);
+
+float3 gammaCorrection(float3 v, GammaTransferParams params) {
+  const bool3 cond = (abs(v) < float3((params.D).xxx));
+  const float3 t = (sign(v) * ((params.C * abs(v)) + params.F));
+  const float3 f = (sign(v) * (pow(((params.A * abs(v)) + params.B), float3((params.G).xxx)) + params.E));
+  return (cond ? t : f);
+}
+
+float4 textureLoadExternal(Texture2D<float4> plane0, Texture2D<float4> plane1, int2 coord, ExternalTextureParams params) {
+  float3 color = float3(0.0f, 0.0f, 0.0f);
+  if ((params.numPlanes == 1u)) {
+    color = plane0.Load(int3(coord, 0)).rgb;
+  } else {
+    color = mul(params.yuvToRgbConversionMatrix, float4(plane0.Load(int3(coord, 0)).r, plane1.Load(int3(coord, 0)).rg, 1.0f));
+  }
+  if ((params.doYuvToRgbConversionOnly == 0u)) {
+    color = gammaCorrection(color, params.gammaDecodeParams);
+    color = mul(color, params.gamutConversionMatrix);
+    color = gammaCorrection(color, params.gammaEncodeParams);
+  }
+  return float4(color, 1.0f);
+}
+
+float4 textureLoad2d(Texture2D<float4> tint_symbol, Texture2D<float4> ext_tex_plane_1_1, ExternalTextureParams ext_tex_params_1, int2 coords) {
+  return textureLoadExternal(tint_symbol, ext_tex_plane_1_1, coords, ext_tex_params_1);
+}
+
+float3x4 tint_symbol_4(uint4 buffer[11], uint offset) {
+  const uint scalar_offset = ((offset + 0u)) / 4;
+  const uint scalar_offset_1 = ((offset + 16u)) / 4;
+  const uint scalar_offset_2 = ((offset + 32u)) / 4;
+  return float3x4(asfloat(buffer[scalar_offset / 4]), asfloat(buffer[scalar_offset_1 / 4]), asfloat(buffer[scalar_offset_2 / 4]));
+}
+
+GammaTransferParams tint_symbol_6(uint4 buffer[11], uint offset) {
+  const uint scalar_offset_3 = ((offset + 0u)) / 4;
+  const uint scalar_offset_4 = ((offset + 4u)) / 4;
+  const uint scalar_offset_5 = ((offset + 8u)) / 4;
+  const uint scalar_offset_6 = ((offset + 12u)) / 4;
+  const uint scalar_offset_7 = ((offset + 16u)) / 4;
+  const uint scalar_offset_8 = ((offset + 20u)) / 4;
+  const uint scalar_offset_9 = ((offset + 24u)) / 4;
+  const uint scalar_offset_10 = ((offset + 28u)) / 4;
+  const GammaTransferParams tint_symbol_10 = {asfloat(buffer[scalar_offset_3 / 4][scalar_offset_3 % 4]), asfloat(buffer[scalar_offset_4 / 4][scalar_offset_4 % 4]), asfloat(buffer[scalar_offset_5 / 4][scalar_offset_5 % 4]), asfloat(buffer[scalar_offset_6 / 4][scalar_offset_6 % 4]), asfloat(buffer[scalar_offset_7 / 4][scalar_offset_7 % 4]), asfloat(buffer[scalar_offset_8 / 4][scalar_offset_8 % 4]), asfloat(buffer[scalar_offset_9 / 4][scalar_offset_9 % 4]), buffer[scalar_offset_10 / 4][scalar_offset_10 % 4]};
+  return tint_symbol_10;
+}
+
+float3x3 tint_symbol_8(uint4 buffer[11], uint offset) {
+  const uint scalar_offset_11 = ((offset + 0u)) / 4;
+  const uint scalar_offset_12 = ((offset + 16u)) / 4;
+  const uint scalar_offset_13 = ((offset + 32u)) / 4;
+  return float3x3(asfloat(buffer[scalar_offset_11 / 4].xyz), asfloat(buffer[scalar_offset_12 / 4].xyz), asfloat(buffer[scalar_offset_13 / 4].xyz));
+}
+
+ExternalTextureParams tint_symbol_2(uint4 buffer[11], uint offset) {
+  const uint scalar_offset_14 = ((offset + 0u)) / 4;
+  const uint scalar_offset_15 = ((offset + 4u)) / 4;
+  const ExternalTextureParams tint_symbol_11 = {buffer[scalar_offset_14 / 4][scalar_offset_14 % 4], buffer[scalar_offset_15 / 4][scalar_offset_15 % 4], tint_symbol_4(buffer, (offset + 16u)), tint_symbol_6(buffer, (offset + 64u)), tint_symbol_6(buffer, (offset + 96u)), tint_symbol_8(buffer, (offset + 128u))};
+  return tint_symbol_11;
+}
+
+void doTextureLoad() {
+  float4 res = textureLoad2d(arg_0, ext_tex_plane_1, tint_symbol_2(ext_tex_params, 0u), (0).xx);
+}
+
+struct tint_symbol_1 {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  doTextureLoad();
+  return (0.0f).xxxx;
+}
+
+tint_symbol_1 vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol_1 wrapper_result = (tint_symbol_1)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  doTextureLoad();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  doTextureLoad();
+  return;
+}

test/tint/builtins/textureLoad/texture_param.wgsl.expected.fxc.hlsl

@@ -0,0 +1,36 @@
+Texture2D<int4> arg_0 : register(t0, space1);
+
+int4 textureLoad2d(Texture2D<int4> tint_symbol, int2 coords, int level) {
+  return tint_symbol.Load(int3(coords, level));
+}
+
+void doTextureLoad() {
+  int4 res = textureLoad2d(arg_0, (0).xx, 0);
+}
+
+struct tint_symbol_1 {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  doTextureLoad();
+  return (0.0f).xxxx;
+}
+
+tint_symbol_1 vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol_1 wrapper_result = (tint_symbol_1)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  doTextureLoad();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  doTextureLoad();
+  return;
+}