Add pack_matrix test

Test/baseResults/hlsl.matpack-pragma-global.frag.out

+hlsl.matpack-pragma-global.frag
+Shader version: 500
+gl_FragCoord origin is upper left
+0:? Sequence
+0:6  Function Definition: @main( ( temp 4-component vector of float)
+0:6    Function Parameters: 
+0:?     Sequence
+0:7      Branch: Return with expression
+0:7        direct index ( temp 4-component vector of float)
+0:7          g_GlobalMat1: direct index for structure ( uniform 4X4 matrix of float)
+0:7            'anon@0' (layout( column_major std140) uniform block{ uniform 4X4 matrix of float g_GlobalMat1})
+0:7            Constant:
+0:7              0 (const uint)
+0:7          Constant:
+0:7            0 (const int)
+0:6  Function Definition: main( ( temp void)
+0:6    Function Parameters: 
+0:?     Sequence
+0:6      move second child to first child ( temp 4-component vector of float)
+0:?         '@entryPointOutput' (layout( location=0) out 4-component vector of float)
+0:6        Function Call: @main( ( temp 4-component vector of float)
+0:?   Linker Objects
+0:?     'anon@0' (layout( column_major std140) uniform block{ uniform 4X4 matrix of float g_GlobalMat1})
+0:?     '@entryPointOutput' (layout( location=0) out 4-component vector of float)
+
+
+Linked fragment stage:
+
+
+Shader version: 500
+gl_FragCoord origin is upper left
+0:? Sequence
+0:6  Function Definition: @main( ( temp 4-component vector of float)
+0:6    Function Parameters: 
+0:?     Sequence
+0:7      Branch: Return with expression
+0:7        direct index ( temp 4-component vector of float)
+0:7          g_GlobalMat1: direct index for structure ( uniform 4X4 matrix of float)
+0:7            'anon@0' (layout( column_major std140) uniform block{ uniform 4X4 matrix of float g_GlobalMat1})
+0:7            Constant:
+0:7              0 (const uint)
+0:7          Constant:
+0:7            0 (const int)
+0:6  Function Definition: main( ( temp void)
+0:6    Function Parameters: 
+0:?     Sequence
+0:6      move second child to first child ( temp 4-component vector of float)
+0:?         '@entryPointOutput' (layout( location=0) out 4-component vector of float)
+0:6        Function Call: @main( ( temp 4-component vector of float)
+0:?   Linker Objects
+0:?     'anon@0' (layout( column_major std140) uniform block{ uniform 4X4 matrix of float g_GlobalMat1})
+0:?     '@entryPointOutput' (layout( location=0) out 4-component vector of float)
+
+// Module Version 10000
+// Generated by (magic number): 8000a
+// Id's are bound by 25
+
+                              Capability Shader
+               1:             ExtInstImport  "GLSL.std.450"
+                              MemoryModel Logical GLSL450
+                              EntryPoint Fragment 4  "main" 23
+                              ExecutionMode 4 OriginUpperLeft
+                              Source HLSL 500
+                              Name 4  "main"
+                              Name 9  "@main("
+                              Name 12  "$Global"
+                              MemberName 12($Global) 0  "g_GlobalMat1"
+                              Name 14  ""
+                              Name 23  "@entryPointOutput"
+                              MemberDecorate 12($Global) 0 ColMajor
+                              MemberDecorate 12($Global) 0 Offset 0
+                              MemberDecorate 12($Global) 0 MatrixStride 16
+                              Decorate 12($Global) Block
+                              Decorate 14 DescriptorSet 0
+                              Decorate 14 Binding 0
+                              Decorate 23(@entryPointOutput) Location 0
+               2:             TypeVoid
+               3:             TypeFunction 2
+               6:             TypeFloat 32
+               7:             TypeVector 6(float) 4
+               8:             TypeFunction 7(fvec4)
+              11:             TypeMatrix 7(fvec4) 4
+     12($Global):             TypeStruct 11
+              13:             TypePointer Uniform 12($Global)
+              14:     13(ptr) Variable Uniform
+              15:             TypeInt 32 1
+              16:     15(int) Constant 0
+              17:             TypePointer Uniform 7(fvec4)
+              22:             TypePointer Output 7(fvec4)
+23(@entryPointOutput):     22(ptr) Variable Output
+         4(main):           2 Function None 3
+               5:             Label
+              24:    7(fvec4) FunctionCall 9(@main()
+                              Store 23(@entryPointOutput) 24
+                              Return
+                              FunctionEnd
+       9(@main():    7(fvec4) Function None 8
+              10:             Label
+              18:     17(ptr) AccessChain 14 16 16
+              19:    7(fvec4) Load 18
+                              ReturnValue 19
+                              FunctionEnd

Test/hlsl.matpack-pragma-global.frag

+#pragma pack_matrix(row_major)
+
+float4x4 g_GlobalMat1;
+
+float4 main() : SV_Target0
+{
+    return g_GlobalMat1[0];
+}

gtests/Hlsl.FromFile.cpp

@@ -279,6 +279,7 @@ INSTANTIATE_TEST_CASE_P(
         {"hlsl.logical.unary.frag", "main"},
         {"hlsl.loopattr.frag", "main"},
         {"hlsl.matpack-pragma.frag", "main"},
+        {"hlsl.matpack-pragma-global.frag", "main"},
         {"hlsl.mip.operator.frag", "main"},
         {"hlsl.mip.negative.frag", "main"},
         {"hlsl.mip.negative2.frag", "main"},