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/firstTrailingBit/110f2c.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+uint4 tint_first_trailing_bit(uint4 v) {
+  uint4 x = uint4(v);
+  const uint4 b16 = (bool4((x & (65535u).xxxx)) ? (0u).xxxx : (16u).xxxx);
+  x = (x >> b16);
+  const uint4 b8 = (bool4((x & (255u).xxxx)) ? (0u).xxxx : (8u).xxxx);
+  x = (x >> b8);
+  const uint4 b4 = (bool4((x & (15u).xxxx)) ? (0u).xxxx : (4u).xxxx);
+  x = (x >> b4);
+  const uint4 b2 = (bool4((x & (3u).xxxx)) ? (0u).xxxx : (2u).xxxx);
+  x = (x >> b2);
+  const uint4 b1 = (bool4((x & (1u).xxxx)) ? (0u).xxxx : (1u).xxxx);
+  const uint4 is_zero = ((x == (0u).xxxx) ? (4294967295u).xxxx : (0u).xxxx);
+  return uint4((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_110f2c() {
+  uint4 arg_0 = (0u).xxxx;
+  uint4 res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_110f2c();
+  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() {
+  firstTrailingBit_110f2c();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_110f2c();
+  return;
+}

test/tint/builtins/gen/var/firstTrailingBit/3a2acc.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+int tint_first_trailing_bit(int v) {
+  uint x = uint(v);
+  const uint b16 = (bool((x & 65535u)) ? 0u : 16u);
+  x = (x >> b16);
+  const uint b8 = (bool((x & 255u)) ? 0u : 8u);
+  x = (x >> b8);
+  const uint b4 = (bool((x & 15u)) ? 0u : 4u);
+  x = (x >> b4);
+  const uint b2 = (bool((x & 3u)) ? 0u : 2u);
+  x = (x >> b2);
+  const uint b1 = (bool((x & 1u)) ? 0u : 1u);
+  const uint is_zero = ((x == 0u) ? 4294967295u : 0u);
+  return int((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_3a2acc() {
+  int arg_0 = 1;
+  int res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_3a2acc();
+  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() {
+  firstTrailingBit_3a2acc();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_3a2acc();
+  return;
+}

test/tint/builtins/gen/var/firstTrailingBit/45eb10.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+uint2 tint_first_trailing_bit(uint2 v) {
+  uint2 x = uint2(v);
+  const uint2 b16 = (bool2((x & (65535u).xx)) ? (0u).xx : (16u).xx);
+  x = (x >> b16);
+  const uint2 b8 = (bool2((x & (255u).xx)) ? (0u).xx : (8u).xx);
+  x = (x >> b8);
+  const uint2 b4 = (bool2((x & (15u).xx)) ? (0u).xx : (4u).xx);
+  x = (x >> b4);
+  const uint2 b2 = (bool2((x & (3u).xx)) ? (0u).xx : (2u).xx);
+  x = (x >> b2);
+  const uint2 b1 = (bool2((x & (1u).xx)) ? (0u).xx : (1u).xx);
+  const uint2 is_zero = ((x == (0u).xx) ? (4294967295u).xx : (0u).xx);
+  return uint2((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_45eb10() {
+  uint2 arg_0 = (0u).xx;
+  uint2 res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_45eb10();
+  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() {
+  firstTrailingBit_45eb10();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_45eb10();
+  return;
+}

test/tint/builtins/gen/var/firstTrailingBit/47d475.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+uint tint_first_trailing_bit(uint v) {
+  uint x = uint(v);
+  const uint b16 = (bool((x & 65535u)) ? 0u : 16u);
+  x = (x >> b16);
+  const uint b8 = (bool((x & 255u)) ? 0u : 8u);
+  x = (x >> b8);
+  const uint b4 = (bool((x & 15u)) ? 0u : 4u);
+  x = (x >> b4);
+  const uint b2 = (bool((x & 3u)) ? 0u : 2u);
+  x = (x >> b2);
+  const uint b1 = (bool((x & 1u)) ? 0u : 1u);
+  const uint is_zero = ((x == 0u) ? 4294967295u : 0u);
+  return uint((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_47d475() {
+  uint arg_0 = 1u;
+  uint res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_47d475();
+  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() {
+  firstTrailingBit_47d475();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_47d475();
+  return;
+}

test/tint/builtins/gen/var/firstTrailingBit/50c072.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+int2 tint_first_trailing_bit(int2 v) {
+  uint2 x = uint2(v);
+  const uint2 b16 = (bool2((x & (65535u).xx)) ? (0u).xx : (16u).xx);
+  x = (x >> b16);
+  const uint2 b8 = (bool2((x & (255u).xx)) ? (0u).xx : (8u).xx);
+  x = (x >> b8);
+  const uint2 b4 = (bool2((x & (15u).xx)) ? (0u).xx : (4u).xx);
+  x = (x >> b4);
+  const uint2 b2 = (bool2((x & (3u).xx)) ? (0u).xx : (2u).xx);
+  x = (x >> b2);
+  const uint2 b1 = (bool2((x & (1u).xx)) ? (0u).xx : (1u).xx);
+  const uint2 is_zero = ((x == (0u).xx) ? (4294967295u).xx : (0u).xx);
+  return int2((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_50c072() {
+  int2 arg_0 = (0).xx;
+  int2 res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_50c072();
+  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() {
+  firstTrailingBit_50c072();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_50c072();
+  return;
+}

test/tint/builtins/gen/var/firstTrailingBit/7496d6.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+int3 tint_first_trailing_bit(int3 v) {
+  uint3 x = uint3(v);
+  const uint3 b16 = (bool3((x & (65535u).xxx)) ? (0u).xxx : (16u).xxx);
+  x = (x >> b16);
+  const uint3 b8 = (bool3((x & (255u).xxx)) ? (0u).xxx : (8u).xxx);
+  x = (x >> b8);
+  const uint3 b4 = (bool3((x & (15u).xxx)) ? (0u).xxx : (4u).xxx);
+  x = (x >> b4);
+  const uint3 b2 = (bool3((x & (3u).xxx)) ? (0u).xxx : (2u).xxx);
+  x = (x >> b2);
+  const uint3 b1 = (bool3((x & (1u).xxx)) ? (0u).xxx : (1u).xxx);
+  const uint3 is_zero = ((x == (0u).xxx) ? (4294967295u).xxx : (0u).xxx);
+  return int3((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_7496d6() {
+  int3 arg_0 = (0).xxx;
+  int3 res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_7496d6();
+  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() {
+  firstTrailingBit_7496d6();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_7496d6();
+  return;
+}

test/tint/builtins/gen/var/firstTrailingBit/86551b.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+int4 tint_first_trailing_bit(int4 v) {
+  uint4 x = uint4(v);
+  const uint4 b16 = (bool4((x & (65535u).xxxx)) ? (0u).xxxx : (16u).xxxx);
+  x = (x >> b16);
+  const uint4 b8 = (bool4((x & (255u).xxxx)) ? (0u).xxxx : (8u).xxxx);
+  x = (x >> b8);
+  const uint4 b4 = (bool4((x & (15u).xxxx)) ? (0u).xxxx : (4u).xxxx);
+  x = (x >> b4);
+  const uint4 b2 = (bool4((x & (3u).xxxx)) ? (0u).xxxx : (2u).xxxx);
+  x = (x >> b2);
+  const uint4 b1 = (bool4((x & (1u).xxxx)) ? (0u).xxxx : (1u).xxxx);
+  const uint4 is_zero = ((x == (0u).xxxx) ? (4294967295u).xxxx : (0u).xxxx);
+  return int4((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_86551b() {
+  int4 arg_0 = (0).xxxx;
+  int4 res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_86551b();
+  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() {
+  firstTrailingBit_86551b();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_86551b();
+  return;
+}

test/tint/builtins/gen/var/firstTrailingBit/cb51ce.wgsl.expected.fxc.hlsl

@@ -0,0 +1,46 @@
+uint3 tint_first_trailing_bit(uint3 v) {
+  uint3 x = uint3(v);
+  const uint3 b16 = (bool3((x & (65535u).xxx)) ? (0u).xxx : (16u).xxx);
+  x = (x >> b16);
+  const uint3 b8 = (bool3((x & (255u).xxx)) ? (0u).xxx : (8u).xxx);
+  x = (x >> b8);
+  const uint3 b4 = (bool3((x & (15u).xxx)) ? (0u).xxx : (4u).xxx);
+  x = (x >> b4);
+  const uint3 b2 = (bool3((x & (3u).xxx)) ? (0u).xxx : (2u).xxx);
+  x = (x >> b2);
+  const uint3 b1 = (bool3((x & (1u).xxx)) ? (0u).xxx : (1u).xxx);
+  const uint3 is_zero = ((x == (0u).xxx) ? (4294967295u).xxx : (0u).xxx);
+  return uint3((((((b16 | b8) | b4) | b2) | b1) | is_zero));
+}
+
+void firstTrailingBit_cb51ce() {
+  uint3 arg_0 = (0u).xxx;
+  uint3 res = tint_first_trailing_bit(arg_0);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  firstTrailingBit_cb51ce();
+  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() {
+  firstTrailingBit_cb51ce();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  firstTrailingBit_cb51ce();
+  return;
+}