4 ms·

Ah, so extremely localized uses of pointers, got it, thanks.

• foldr 2y ago
  More or less, yes, but it doesn't have to be extremely local. Here's a variant of the example that introduces a function call boundary: https://godbolt.org/#g:!((g:!((g:!((h:codeEditor,i:(filename:'1',fontScale:14,fontUsePx:'0',j:1,lang:go,selection:(endColumn:1,endLineNumber:19,positionColumn:1,positionLineNumber:19,selectionStartColumn:1,selectionStartLineNumber:19,startColumn:1,startLineNumber:19),source:'//+Type+your+code+here,+or+load+an+example.%0A//+Your+function+name+should+start+with+a+capital+letter.%0Apackage+main%0A%0Aimport+%22fmt%22%0A%0A//+example+to+show+what+an+allocation+looks+like+in+the+generated+asm%0Afunc+foo()+*int+%7B%0A++++return+new(int)%0A%7D%0A%0A//+no+allocation+here%0Afunc+main()+%7B%0A++++x+:%3D+7%0A++++px+:%3D+%26x%0A++++*px+%3D+8%0A++++fmt.Printf(%22x:+%25v%5Cn%22,+x)%0A%7D%0A'),l:'5',n:'1',o:'Go+source+%231',t:'0')),k:37.5,l:'4',n:'0',o:'',s:0,t:'0'),(g:!((g:!((h:compiler,i:(compiler:gl1221,filters:(b:1,binary:'1',binaryObject:'1',commentOnly:1,debugCalls:'1',demangle:'0',directives:1,execute:1,intel:1,libraryCode:'0',trim:'1',verboseDemangling:'0'),flagsViewOpen:'1',fontScale:14,fontUsePx:'0',j:1,lang:go,libs:!(),options:'',overrides:!(),selection:(endColumn:1,endLineNumber:1,positionColumn:1,positionLineNumber:1,selectionStartColumn:1,selectionStartLineNumber:1,startColumn:1,startLineNumber:1),source:1),l:'5',n:'0',o:'+x86-64+gc+1.22.1+(Editor+%231)',t:'0')),l:'4',m:50,n:'0',o:'',s:0,t:'0'),(g:!((h:output,i:(fontScale:14,fontUsePx:'0',j:1,wrap:'1'),l:'5',n:'0',o:'Output+of+x86-64+gc+1.22.1+(Compiler+%231)',t:'0')),l:'4',m:50,n:'0',o:'',s:0,t:'0')),k:37.5,l:'3',n:'0',o:'',t:'0'),(g:!((h:executor,i:(argsPanelShown:'1',compilationPanelShown:'0',compiler:gl1221,compilerName:'',compilerOutShown:'1',execArgs:'',execStdin:'',fontScale:14,fontUsePx:'0',j:2,lang:go,libs:!(),options:'',overrides:!(),runtimeTools:!(),source:1,stdinPanelShown:'1',wrap:'1'),l:'5',n:'0',o:'Executor+x86-64+gc+1.22.1+(Go,+Editor+%231)',t:'0')),k:25,l:'4',m:100,n:'0',o:'',s:0,t:'0')),l:'2',n:'0',o:'',t:'0')),version:4 https://godbolt.org/#g:!((g:!((g:!((h:codeEditor,i:(filename...
  • foldr 2y ago
    Oops, copy paste error there. Here is the example with the function call boundary: https://godbolt.org/#g:!((g:!((g:!((h:codeEditor,i:(filename:'1',fontScale:14,fontUsePx:'0',j:1,lang:go,selection:(endColumn:1,endLineNumber:23,positionColumn:1,positionLineNumber:23,selectionStartColumn:1,selectionStartLineNumber:23,startColumn:1,startLineNumber:23),source:'//+Type+your+code+here,+or+load+an+example.%0A//+Your+function+name+should+start+with+a+capital+letter.%0Apackage+main%0A%0Aimport+%22fmt%22%0A%0A//+example+to+show+what+an+allocation+looks+like+in+the+generated+asm%0Afunc+foo()+*int+%7B%0A++++return+new(int)%0A%7D%0A%0Afunc+setInt(x+*int,+y+int)+%7B%0A++++*x+%3D+y%0A%7D%0A%0A//+no+allocation+here%0Afunc+main()+%7B%0A++++x+:%3D+7%0A++++px+:%3D+%26x%0A++++setInt(px,+8)%0A++++fmt.Printf(%22x:+%25v%5Cn%22,+x)%0A%7D%0A'),l:'5',n:'1',o:'Go+source+%231',t:'0')),k:37.5,l:'4',n:'0',o:'',s:0,t:'0'),(g:!((g:!((h:compiler,i:(compiler:gl1221,filters:(b:1,binary:'1',binaryObject:'1',commentOnly:1,debugCalls:'1',demangle:'0',directives:1,execute:1,intel:1,libraryCode:'0',trim:'1',verboseDemangling:'0'),flagsViewOpen:'1',fontScale:14,fontUsePx:'0',j:1,lang:go,libs:!(),options:'',overrides:!(),selection:(endColumn:1,endLineNumber:1,positionColumn:1,positionLineNumber:1,selectionStartColumn:1,selectionStartLineNumber:1,startColumn:1,startLineNumber:1),source:1),l:'5',n:'0',o:'+x86-64+gc+1.22.1+(Editor+%231)',t:'0')),l:'4',m:50,n:'0',o:'',s:0,t:'0'),(g:!((h:output,i:(fontScale:14,fontUsePx:'0',j:1,wrap:'1'),l:'5',n:'0',o:'Output+of+x86-64+gc+1.22.1+(Compiler+%231)',t:'0')),l:'4',m:50,n:'0',o:'',s:0,t:'0')),k:37.5,l:'3',n:'0',o:'',t:'0'),(g:!((h:executor,i:(argsPanelShown:'1',compilationPanelShown:'0',compiler:gl1221,compilerName:'',compilerOutShown:'1',execArgs:'',execStdin:'',fontScale:14,fontUsePx:'0',j:2,lang:go,libs:!(),options:'',overrides:!(),runtimeTools:!(),source:1,stdinPanelShown:'1',wrap:'1'),l:'5',n:'0',o:'Executor+x86-64+gc+1.22.1+(Go,+Editor+%231)',t:'0')),k:25,l:'4',m:100,n:'0',o:'',s:0,t:'0')),l:'2',n:'0',o:'',t:'0')),version:4 https://godbolt.org/#g:!((g:!((g:!((h:codeEditor,i:(filename...