Add tests derived from VK-GL-CTS

This adds SPIR-V assembly and WGSL tests derived from VK-GL-CTS commit
571256871c2e2f03995373e1e4a02958d8cd8cf5. The following procedure was
followed:

- Those .amber files in VK-GL-CTS wholly owned by Google were
  identified

- All GLSL and SPIR-V shaders were extracted from the Amber files and
  converted into SPIR-V binaries

- The compact-ids pass of spirv-opt was applied to each binary

- Duplicate binaries were removed

- spirv-opt -O was used to obtain an optimized version of each remaining
  binary, with duplicates discarded

- Binaries that failed validation using spirv-val with target
  environment SPIR-V 1.3 were discarded

- Those binaries that tint could not successfully convert into WGSL were
  put aside for further investigation

- SPIR-V assembly versions of the remaining binaries are included in
  this CL

- test-runner with -generate-expected and -generate-skip was used to
  generate expected .spvasm, .msl, .hlsl and .wgsl outputs for these
  SPIR-V assembly tests

- Each successfully-generated .expected.wgsl is included in this CL
  again, as a WGLSL test

- test-runner with -generate-expected and -generate-skip was used again,
  to generate expected outputs for these WGSL tests

Change-Id: Ibe9baf2729cf97e0b633db9a426f53362a5de540
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/58842
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>

test/vk-gl-cts/graphicsfuzz/stable-triangle-nested-conditional-clamped-float/0.spvasm.expected.hlsl

@@ -0,0 +1,141 @@
+static float4 gl_FragCoord = float4(0.0f, 0.0f, 0.0f, 0.0f);
+cbuffer cbuffer_x_24 : register(b0, space0) {
+  uint4 x_24[1];
+};
+static float4 x_GLF_color = float4(0.0f, 0.0f, 0.0f, 0.0f);
+
+float cross2d_vf2_vf2_(inout float2 a, inout float2 b) {
+  const float x_76 = a.x;
+  const float x_78 = b.y;
+  const float x_81 = b.x;
+  const float x_83 = a.y;
+  return ((x_76 * x_78) - (x_81 * x_83));
+}
+
+int pointInTriangle_vf2_vf2_vf2_vf2_(inout float2 p, inout float2 a_1, inout float2 b_1, inout float2 c) {
+  float pab = 0.0f;
+  float2 param = float2(0.0f, 0.0f);
+  float2 param_1 = float2(0.0f, 0.0f);
+  float pbc = 0.0f;
+  float2 param_2 = float2(0.0f, 0.0f);
+  float2 param_3 = float2(0.0f, 0.0f);
+  float pca = 0.0f;
+  float2 param_4 = float2(0.0f, 0.0f);
+  float2 param_5 = float2(0.0f, 0.0f);
+  bool x_145 = false;
+  bool x_185 = false;
+  bool x_146_phi = false;
+  bool x_186_phi = false;
+  const float x_88 = p.x;
+  const float x_90 = a_1.x;
+  const float x_93 = p.y;
+  const float x_95 = a_1.y;
+  const float x_99 = b_1.x;
+  const float x_101 = a_1.x;
+  const float x_104 = b_1.y;
+  const float x_106 = a_1.y;
+  param = float2((x_88 - x_90), (x_93 - x_95));
+  param_1 = float2((x_99 - x_101), (x_104 - x_106));
+  const float x_109 = cross2d_vf2_vf2_(param, param_1);
+  pab = x_109;
+  const float x_111 = p.x;
+  const float x_113 = b_1.x;
+  const float x_116 = p.y;
+  const float x_118 = b_1.y;
+  const float x_122 = c.x;
+  const float x_124 = b_1.x;
+  const float x_127 = c.y;
+  const float x_129 = b_1.y;
+  param_2 = float2((x_111 - x_113), (x_116 - x_118));
+  param_3 = float2((x_122 - x_124), (x_127 - x_129));
+  const float x_132 = cross2d_vf2_vf2_(param_2, param_3);
+  pbc = x_132;
+  bool tint_tmp = (pab < 0.0f);
+  if (tint_tmp) {
+    tint_tmp = (pbc < 0.0f);
+  }
+  const bool x_137 = (tint_tmp);
+  x_146_phi = x_137;
+  if (!(x_137)) {
+    bool tint_tmp_1 = (pab >= 0.0f);
+    if (tint_tmp_1) {
+      tint_tmp_1 = (pbc >= 0.0f);
+    }
+    x_145 = (tint_tmp_1);
+    x_146_phi = x_145;
+  }
+  if (!(x_146_phi)) {
+    return 0;
+  }
+  const float x_151 = p.x;
+  const float x_153 = c.x;
+  const float x_156 = p.y;
+  const float x_158 = c.y;
+  const float x_162 = a_1.x;
+  const float x_164 = c.x;
+  const float x_167 = a_1.y;
+  const float x_169 = c.y;
+  param_4 = float2((x_151 - x_153), (x_156 - x_158));
+  param_5 = float2((x_162 - x_164), (x_167 - x_169));
+  const float x_172 = cross2d_vf2_vf2_(param_4, param_5);
+  pca = x_172;
+  bool tint_tmp_2 = (pab < 0.0f);
+  if (tint_tmp_2) {
+    tint_tmp_2 = (pca < 0.0f);
+  }
+  const bool x_177 = (tint_tmp_2);
+  x_186_phi = x_177;
+  if (!(x_177)) {
+    bool tint_tmp_3 = (pab >= 0.0f);
+    if (tint_tmp_3) {
+      tint_tmp_3 = (pca >= 0.0f);
+    }
+    x_185 = (tint_tmp_3);
+    x_186_phi = x_185;
+  }
+  if (!(x_186_phi)) {
+    return 0;
+  }
+  return 1;
+}
+
+void main_1() {
+  float2 pos = float2(0.0f, 0.0f);
+  float2 param_6 = float2(0.0f, 0.0f);
+  float2 param_7 = float2(0.0f, 0.0f);
+  float2 param_8 = float2(0.0f, 0.0f);
+  float2 param_9 = float2(0.0f, 0.0f);
+  const float4 x_63 = gl_FragCoord;
+  const float2 x_66 = asfloat(x_24[0].xy);
+  pos = (float2(x_63.x, x_63.y) / x_66);
+  param_6 = pos;
+  param_7 = float2(0.699999988f, 0.300000012f);
+  param_8 = float2(0.5f, 0.899999976f);
+  param_9 = float2(0.100000001f, 0.400000006f);
+  const int x_69 = pointInTriangle_vf2_vf2_vf2_vf2_(param_6, param_7, param_8, param_9);
+  if ((x_69 == 1)) {
+    x_GLF_color = float4(1.0f, 0.0f, 0.0f, 1.0f);
+  } else {
+    x_GLF_color = float4(0.0f, 0.0f, 0.0f, 1.0f);
+  }
+  return;
+}
+
+struct main_out {
+  float4 x_GLF_color_1;
+};
+struct tint_symbol_1 {
+  float4 gl_FragCoord_param : SV_Position;
+};
+struct tint_symbol_2 {
+  float4 x_GLF_color_1 : SV_Target0;
+};
+
+tint_symbol_2 main(tint_symbol_1 tint_symbol) {
+  const float4 gl_FragCoord_param = tint_symbol.gl_FragCoord_param;
+  gl_FragCoord = gl_FragCoord_param;
+  main_1();
+  const main_out tint_symbol_3 = {x_GLF_color};
+  const tint_symbol_2 tint_symbol_5 = {tint_symbol_3.x_GLF_color_1};
+  return tint_symbol_5;
+}