{"action":"created","issue":{"url":"https://api.github.com/repos/dotnet/coreclr/issues/6276","repository_url":"https://api.github.com/repos/dotnet/coreclr","labels_url":"https://api.github.com/repos/dotnet/coreclr/issues/6276/labels{/name}","comments_url":"https://api.github.com/repos/dotnet/coreclr/issues/6276/comments","events_url":"https://api.github.com/repos/dotnet/coreclr/issues/6276/events","html_url":"https://github.com/dotnet/coreclr/pull/6276","id":165585518,"number":6276,"title":"Clean up localloc implementation","user":{"login":"BruceForstall","id":10901265,"avatar_url":"https://avatars.githubusercontent.com/u/10901265?v=3","gravatar_id":"","url":"https://api.github.com/users/BruceForstall","html_url":"https://github.com/BruceForstall","followers_url":"https://api.github.com/users/BruceForstall/followers","following_url":"https://api.github.com/users/BruceForstall/following{/other_user}","gists_url":"https://api.github.com/users/BruceForstall/gists{/gist_id}","starred_url":"https://api.github.com/users/BruceForstall/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/BruceForstall/subscriptions","organizations_url":"https://api.github.com/users/BruceForstall/orgs","repos_url":"https://api.github.com/users/BruceForstall/repos","events_url":"https://api.github.com/users/BruceForstall/events{/privacy}","received_events_url":"https://api.github.com/users/BruceForstall/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/dotnet/coreclr/labels/cla-already-signed","name":"cla-already-signed","color":"009800"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":6,"created_at":"2016-07-14T15:11:02Z","updated_at":"2016-07-14T18:39:45Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/dotnet/coreclr/pulls/6276","html_url":"https://github.com/dotnet/coreclr/pull/6276","diff_url":"https://github.com/dotnet/coreclr/pull/6276.diff","patch_url":"https://github.com/dotnet/coreclr/pull/6276.patch"},"body":"Reduce the differences between x86 and AMD64 codegen to reduce the number of `#ifdef`s. This changes AMD64 codegen for initialized locallocs by using the x86 style \"dec\" loop instead of \"sub rsp,16\". Saves one byte of code size per instance. I ran all standard internal testing on this change.\r\n\r\n@sivarv PTAL\r\ncc @dotnet/jit-contrib \r\n"},"comment":{"url":"https://api.github.com/repos/dotnet/coreclr/issues/comments/232754420","html_url":"https://github.com/dotnet/coreclr/pull/6276#issuecomment-232754420","issue_url":"https://api.github.com/repos/dotnet/coreclr/issues/6276","id":232754420,"user":{"login":"briansull","id":11621884,"avatar_url":"https://avatars.githubusercontent.com/u/11621884?v=3","gravatar_id":"","url":"https://api.github.com/users/briansull","html_url":"https://github.com/briansull","followers_url":"https://api.github.com/users/briansull/followers","following_url":"https://api.github.com/users/briansull/following{/other_user}","gists_url":"https://api.github.com/users/briansull/gists{/gist_id}","starred_url":"https://api.github.com/users/briansull/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/briansull/subscriptions","organizations_url":"https://api.github.com/users/briansull/orgs","repos_url":"https://api.github.com/users/briansull/repos","events_url":"https://api.github.com/users/briansull/events{/privacy}","received_events_url":"https://api.github.com/users/briansull/received_events","type":"User","site_admin":false},"created_at":"2016-07-14T18:39:45Z","updated_at":"2016-07-14T18:39:45Z","body":"There aren't any \"smaller\" instructions on ARM64.  \r\nIf you are reading/writing a memory location you can subsume the increment or decrement into the addressing mode to same an instruction. (Post-Inc or Pre-Dec, etc..)\r\nThe  increment/decrement a register instruction is add/sub with a 12-bit constant.\r\n"}}
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