add some additional error testing

Author: inbelic

clang/test/SemaHLSL/RootSignature-err.hlsl

@@ -0,0 +1,54 @@
+// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -x hlsl -o - %s -verify
+
+// This file mirrors the diagnostics testing in ParseHLSLRootSignatureTest.cpp
+// to verify that the correct diagnostics strings are output
+
+// Lexer related tests
+
+#define InvalidToken \
+  "DescriptorTable( " \
+  "  invalid " \
+  ")"
+
+[RootSignature(InvalidToken)] // expected-error {{unable to lex a valid Root Signature token}}
+void bad_root_signature_1() {}
+
+#define InvalidEmptyNumber \
+  "DescriptorTable( " \
+  "  CBV(t32, space = +) " \
+  ")"
+
+[RootSignature(InvalidEmptyNumber)] // expected-error {{expected number literal is not a supported number literal of unsigned integer or integer}}
+void bad_root_signature_2() {}
+
+#define InvalidOverflowNumber \
+  "DescriptorTable( " \
+  "  CBV(t32, space = 98273498327498273487) " \
+  ")"
+
+[RootSignature(InvalidOverflowNumber)] // expected-error {{provided unsigned integer literal '98273498327498273487' that overflows the maximum of 32 bits}}
+void bad_root_signature_3() {}
+
+#define InvalidEOS \
+  "DescriptorTable( "
+
+// Parser related tests
+
+[RootSignature(InvalidEOS)] // expected-error {{unexpected end to token stream}}
+void bad_root_signature_4() {}
+
+#define InvalidTokenKind \
+  "DescriptorTable( " \
+  "  DescriptorTable()" \
+  ")"
+
+[RootSignature(InvalidTokenKind)] // expected-error {{expected the one of the following token kinds 'CBV, SRV, UAV, Sampler'}}
+void bad_root_signature_5() {}
+
+#define InvalidRepeat \
+  "DescriptorTable( " \
+  "  CBV(t0, space = 1, space = 2)" \
+  ")"
+
+[RootSignature(InvalidRepeat)] // expected-error {{specified the same parameter 'space' multiple times}}
+void bad_root_signature_6() {}