Implement neg (float/integer) and not IL instructions. Fixes #4524 and #4525 (#4725)

* Implement neg (float/integer) and not IL instructions. Fixes #4524 and #4525

* Neg and not basic tests added to HelloWasm.
Name parameter updated in LLVM build methods to reflect the operation being built.
Use PushExpression method instead of direct push to stack.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/ILCompiler.WebAssembly/src/CodeGen/ILToWebAssemblyImporter.cs b/src/ILCompiler.WebAssembly/src/CodeGen/ILToWebAssemblyImporter.cs
index cd09a1ef9..7a465901f 100644
--- a/src/ILCompiler.WebAssembly/src/CodeGen/ILToWebAssemblyImporter.cs
+++ b/src/ILCompiler.WebAssembly/src/CodeGen/ILToWebAssemblyImporter.cs
@@ -1087,6 +1087,29 @@ namespace Internal.IL
 
         private void ImportUnaryOperation(ILOpcode opCode)
         {
+            var argument = _stack.Pop();
+             
+            LLVMValueRef result;
+            switch (opCode)
+            {
+                case ILOpcode.neg:
+                    if (argument.Kind == StackValueKind.Float)
+                    {
+                        result = LLVM.BuildFNeg(_builder, argument.LLVMValue, "neg");
+                    }   
+                    else
+                    {
+                        result = LLVM.BuildNeg(_builder, argument.LLVMValue, "neg");
+                    }
+                    break;
+                case ILOpcode.not:
+                    result = LLVM.BuildNot(_builder, argument.LLVMValue, "not");
+                    break;
+                default:
+                    throw new NotSupportedException(); // unreachable
+            }
+
+            PushExpression(argument.Kind, "", result, argument.Type);
         }
 
         private void ImportCpOpj(int token)