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/gen/var/textureSampleGrad/21402b.wgsl.expected.fxc.hlsl

@@ -0,0 +1,36 @@
+Texture3D<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_21402b() {
+  float3 arg_2 = (0.0f).xxx;
+  float3 arg_3 = (0.0f).xxx;
+  float3 arg_4 = (0.0f).xxx;
+  float4 res = arg_0.SampleGrad(arg_1, arg_2, arg_3, arg_4);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_21402b();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_21402b();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_21402b();
+  return;
+}

test/tint/builtins/gen/var/textureSampleGrad/2ecd8f.wgsl.expected.fxc.hlsl

@@ -0,0 +1,37 @@
+Texture2DArray<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_2ecd8f() {
+  float2 arg_2 = (0.0f).xx;
+  int arg_3 = 1;
+  float2 arg_4 = (0.0f).xx;
+  float2 arg_5 = (0.0f).xx;
+  float4 res = arg_0.SampleGrad(arg_1, float3(arg_2, float(arg_3)), arg_4, arg_5);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_2ecd8f();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_2ecd8f();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_2ecd8f();
+  return;
+}

test/tint/builtins/gen/var/textureSampleGrad/521263.wgsl.expected.fxc.hlsl

@@ -0,0 +1,36 @@
+Texture2D<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_521263() {
+  float2 arg_2 = (0.0f).xx;
+  float2 arg_3 = (0.0f).xx;
+  float2 arg_4 = (0.0f).xx;
+  float4 res = arg_0.SampleGrad(arg_1, arg_2, arg_3, arg_4);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_521263();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_521263();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_521263();
+  return;
+}

test/tint/builtins/gen/var/textureSampleGrad/5312f4.wgsl.expected.fxc.hlsl

@@ -0,0 +1,36 @@
+TextureCube<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_5312f4() {
+  float3 arg_2 = (0.0f).xxx;
+  float3 arg_3 = (0.0f).xxx;
+  float3 arg_4 = (0.0f).xxx;
+  float4 res = arg_0.SampleGrad(arg_1, arg_2, arg_3, arg_4);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_5312f4();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_5312f4();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_5312f4();
+  return;
+}

test/tint/builtins/gen/var/textureSampleGrad/5884dd.wgsl.expected.fxc.hlsl

@@ -0,0 +1,36 @@
+Texture3D<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_5884dd() {
+  float3 arg_2 = (0.0f).xxx;
+  float3 arg_3 = (0.0f).xxx;
+  float3 arg_4 = (0.0f).xxx;
+  float4 res = arg_0.SampleGrad(arg_1, arg_2, arg_3, arg_4, (0).xxx);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_5884dd();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_5884dd();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_5884dd();
+  return;
+}

test/tint/builtins/gen/var/textureSampleGrad/d4e3c5.wgsl.expected.fxc.hlsl

@@ -0,0 +1,36 @@
+Texture2D<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_d4e3c5() {
+  float2 arg_2 = (0.0f).xx;
+  float2 arg_3 = (0.0f).xx;
+  float2 arg_4 = (0.0f).xx;
+  float4 res = arg_0.SampleGrad(arg_1, arg_2, arg_3, arg_4, (0).xx);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_d4e3c5();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_d4e3c5();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_d4e3c5();
+  return;
+}

test/tint/builtins/gen/var/textureSampleGrad/d65515.wgsl.expected.fxc.hlsl

@@ -0,0 +1,37 @@
+Texture2DArray<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_d65515() {
+  float2 arg_2 = (0.0f).xx;
+  int arg_3 = 1;
+  float2 arg_4 = (0.0f).xx;
+  float2 arg_5 = (0.0f).xx;
+  float4 res = arg_0.SampleGrad(arg_1, float3(arg_2, float(arg_3)), arg_4, arg_5, (0).xx);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_d65515();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_d65515();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_d65515();
+  return;
+}

test/tint/builtins/gen/var/textureSampleGrad/e383db.wgsl.expected.fxc.hlsl

@@ -0,0 +1,37 @@
+TextureCubeArray<float4> arg_0 : register(t0, space1);
+SamplerState arg_1 : register(s1, space1);
+
+void textureSampleGrad_e383db() {
+  float3 arg_2 = (0.0f).xxx;
+  int arg_3 = 1;
+  float3 arg_4 = (0.0f).xxx;
+  float3 arg_5 = (0.0f).xxx;
+  float4 res = arg_0.SampleGrad(arg_1, float4(arg_2, float(arg_3)), arg_4, arg_5);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  textureSampleGrad_e383db();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  textureSampleGrad_e383db();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  textureSampleGrad_e383db();
+  return;
+}