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/expressions/binary/div_by_zero/by_expression/scalar-scalar/f32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,7 @@
+[numthreads(1, 1, 1)]
+void f() {
+  float a = 1.0f;
+  float b = 0.0f;
+  const float r = (a / (b + b));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/scalar-scalar/i32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+int value_or_one_if_zero_int(int value) {
+  return value == 0 ? 1 : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  int a = 1;
+  int b = 0;
+  const int r = (a / value_or_one_if_zero_int((b + b)));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/scalar-scalar/u32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+uint value_or_one_if_zero_uint(uint value) {
+  return value == 0u ? 1u : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  uint a = 1u;
+  uint b = 0u;
+  const uint r = (a / value_or_one_if_zero_uint((b + b)));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/scalar-vec3/f32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,7 @@
+[numthreads(1, 1, 1)]
+void f() {
+  float a = 4.0f;
+  float3 b = float3(0.0f, 2.0f, 0.0f);
+  const float3 r = (a / (b + b));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/scalar-vec3/i32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+int3 value_or_one_if_zero_int3(int3 value) {
+  return value == int3(0, 0, 0) ? int3(1, 1, 1) : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  int a = 4;
+  int3 b = int3(0, 2, 0);
+  const int3 r = (a / value_or_one_if_zero_int3((b + b)));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/scalar-vec3/u32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+uint3 value_or_one_if_zero_uint3(uint3 value) {
+  return value == uint3(0u, 0u, 0u) ? uint3(1u, 1u, 1u) : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  uint a = 4u;
+  uint3 b = uint3(0u, 2u, 0u);
+  const uint3 r = (a / value_or_one_if_zero_uint3((b + b)));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/vec3-scalar/f32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,7 @@
+[numthreads(1, 1, 1)]
+void f() {
+  float3 a = float3(1.0f, 2.0f, 3.0f);
+  float b = 0.0f;
+  const float3 r = (a / (b + b));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/vec3-scalar/i32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+int value_or_one_if_zero_int(int value) {
+  return value == 0 ? 1 : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  int3 a = int3(1, 2, 3);
+  int b = 0;
+  const int3 r = (a / value_or_one_if_zero_int((b + b)));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/vec3-scalar/u32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+uint value_or_one_if_zero_uint(uint value) {
+  return value == 0u ? 1u : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  uint3 a = uint3(1u, 2u, 3u);
+  uint b = 0u;
+  const uint3 r = (a / value_or_one_if_zero_uint((b + b)));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/vec3-vec3/f32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,7 @@
+[numthreads(1, 1, 1)]
+void f() {
+  float3 a = float3(1.0f, 2.0f, 3.0f);
+  float3 b = float3(0.0f, 5.0f, 0.0f);
+  const float3 r = (a / (b + b));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/vec3-vec3/i32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+int3 value_or_one_if_zero_int3(int3 value) {
+  return value == int3(0, 0, 0) ? int3(1, 1, 1) : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  int3 a = int3(1, 2, 3);
+  int3 b = int3(0, 5, 0);
+  const int3 r = (a / value_or_one_if_zero_int3((b + b)));
+  return;
+}

test/tint/expressions/binary/div_by_zero/by_expression/vec3-vec3/u32.wgsl.expected.fxc.hlsl

@@ -0,0 +1,11 @@
+uint3 value_or_one_if_zero_uint3(uint3 value) {
+  return value == uint3(0u, 0u, 0u) ? uint3(1u, 1u, 1u) : value;
+}
+
+[numthreads(1, 1, 1)]
+void f() {
+  uint3 a = uint3(1u, 2u, 3u);
+  uint3 b = uint3(0u, 5u, 0u);
+  const uint3 r = (a / value_or_one_if_zero_uint3((b + b)));
+  return;
+}