From 354e27c09603143cef43d666be5beaed8928c040 Mon Sep 17 00:00:00 2001 From: Stephane Delcroix Date: Mon, 12 Dec 2016 21:49:05 +0100 Subject: [XamlC] Optimize Stloc/Ldloc (#614) --- Xamarin.Forms.Build.Tasks/MethodBodyExtensions.cs | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'Xamarin.Forms.Build.Tasks') diff --git a/Xamarin.Forms.Build.Tasks/MethodBodyExtensions.cs b/Xamarin.Forms.Build.Tasks/MethodBodyExtensions.cs index f5bdc859..380cb59c 100644 --- a/Xamarin.Forms.Build.Tasks/MethodBodyExtensions.cs +++ b/Xamarin.Forms.Build.Tasks/MethodBodyExtensions.cs @@ -12,6 +12,7 @@ namespace Xamarin.Forms.Build.Tasks throw new ArgumentNullException(nameof(self)); self.OptimizeLongs(); + self.OptimizeStLdLoc(); self.OptimizeMacros(); } @@ -36,5 +37,24 @@ namespace Xamarin.Forms.Build.Tasks self.Instructions.Insert(++i, Instruction.Create(OpCodes.Conv_I8)); } } + + static void OptimizeStLdLoc(this MethodBody self) + { + var method = self.Method; + for (var i = 0; i < self.Instructions.Count; i++) { + var instruction = self.Instructions[i]; + if (instruction.OpCode.Code != Code.Stloc) + continue; + if (i + 1 >= self.Instructions.Count) + continue; + var next = self.Instructions[i + 1]; + int num = ((VariableDefinition)instruction.Operand).Index; + var vardef = instruction.Operand; + if (next.OpCode.Code != Code.Ldloc || num != ((VariableDefinition)next.Operand).Index) + continue; + ExpandMacro(instruction, OpCodes.Dup, null); + ExpandMacro(next, OpCodes.Stloc, vardef); + } + } } } \ No newline at end of file -- cgit v1.2.3