shader: hash only the program code and literal buffer

tests/shaderCfgTests.cpp

@@ -1941,6 +1941,42 @@ void TestVertexBufferGrouping() {
   Check(!input.has_dynamic_vertex_fetch, "remapping a shader kept its previous vertex metadata");
 }
 
+void TestShaderProgramHash() {
+  using Binary = std::array<uint32_t, 22>;
+  // One code word, a 16-byte literal buffer at 16, 8 bytes of metadata, then the 0x30-byte
+  // footer, whose key and checksum cover the whole binary.
+  const auto Make = [](uint32_t literal, uint32_t metadata, uint32_t version = 1,
+                       uint32_t code_size = 4) {
+    Binary words{};
+    words[0] = EncodeSopp(0x01);
+    words[4] = literal;
+    words[8] = metadata;
+    std::memcpy(&words[10], "barefoot", 8);
+    words[12] = metadata;
+    words[14] = version;
+    words[15] = code_size;
+    words[16] = 16;
+    words[18] = metadata;
+    return words;
+  };
+  const auto Map = [](const Binary &binary) {
+    ShaderMappedData mapped{};
+    mapped.code_size_bytes = sizeof(binary);
+    HW::ComputeShaderInfo regs{};
+    regs.cs_regs.data_addr = reinterpret_cast<uint64_t>(binary.data());
+    ShaderMapUserData(regs.cs_regs.data_addr, mapped);
+    ShaderComputeInputInfo input{};
+    return PrepareProgram(regs, input);
+  };
+  Check(Map(Make(7, 1)).hash == Map(Make(7, 2)).hash,
+        "binaries differing only in metadata got different programs");
+  Check(Map(Make(7, 1)).hash != Map(Make(8, 1)).hash, "the program hash missed the literal buffer");
+  Check(Map(Make(7, 1)).code.size() == 8, "translation must read only the hashed program bytes");
+  Check(Map(Make(7, 1, 2)).hash != Map(Make(7, 2, 2)).hash &&
+            Map(Make(7, 1, 1, 0)).hash != Map(Make(7, 2, 1, 0)).hash,
+        "a binary with an unknown footer must hash whole");
+}
+
 void TestNggVertexEntryState() {
   using namespace ShaderRecompiler;
   // PPSA03309 shader 5a39eb2021a5d2c1: retain its NGG prologue and replace
@@ -17221,6 +17257,7 @@ int main() {
   TestNewShaderRecompilerSMovB32();
   TestShaderStageBarriers();
   TestVertexBufferGrouping();
+  TestShaderProgramHash();
   TestNggVertexEntryState();
   TestNewShaderRecompilerClipDisabledPosition();
   TestNewShaderRecompilerAuxPositionExports();