{"id":187667,"date":"2020-11-08T06:03:37","date_gmt":"2020-11-07T22:03:37","guid":{"rendered":"http:\/\/4563.org\/?p=187667"},"modified":"2020-11-08T06:03:37","modified_gmt":"2020-11-07T22:03:37","slug":"%e6%b1%82%e9%97%ae-gcc9-%e4%b8%ad-o1-%e6%af%94-o0-%e5%a4%9a%e4%ba%86%e5%93%aa%e4%ba%9b%e4%bc%98%e5%8c%96%e9%80%89%e9%a1%b9%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=187667","title":{"rendered":"\u6c42\u95ee gcc9 \u4e2d-O1 \u6bd4-O0 \u591a\u4e86\u54ea\u4e9b\u4f18\u5316\u9009\u9879\uff1f"},"content":{"rendered":"
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\u6c42\u95ee gcc9 \u4e2d-O1 \u6bd4-O0 \u591a\u4e86\u54ea\u4e9b\u4f18\u5316\u9009\u9879\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : xutl <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
1. linux \u4f7f\u7528 gcc4 -O1\uff0c\u4e0d\u4f1a crash
2. win + mingw + gcc9 -O1, crash \u3002\u4ee3\u7801\u76f8\u540c<\/p>\n

\u76ee\u524d\u67e5\u627e\u4e86 gnu \u7684\u6587\u6863\uff0c\u627e\u5230\u4e86\u4e00\u4e9b-O1 \u6bd4-O0 \u591a\u7684\u4f18\u5316\u9009\u9879\uff0c\u5168\u90e8\u52a0\u4e0a\u4ee5\u540e\uff0c\u5e76\u4e0d crash \u3002\u4f46\u662f\u76f4\u63a5\u52a0-O1 \u7684\u8bdd\u5c31\u4f1a crash \u3002\u76ee\u524d bug \u8fd8\u5728\u6392\u67e5\u4e2d…\u671b\u5404\u4f4d\u5927\u4f6c\u7ed9\u89e3\u7b54\u4e00\u4e0b\u5b50\uff01 <\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (12<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : typetraits <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    https:\/\/stackoverflow.com\/questions\/60386091\/what-exactly-is-the-difference-between-various-optimization-levels-in-gcc-g <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ysc3839 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8bf7\u53d1\u4ee3\u7801\u770b\u770b\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lv2016 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    https:\/\/gcc.gnu.org\/onlinedocs\/gcc\/Optimize-Options.html.
    \u4ee5\u53ca \u201cNot all optimizations are controlled directly by a flag. Only optimizations that have a flag are listed in this section.\u201d <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : xutl <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ysc3839 \u4ee3\u7801\u662f\u6574\u4e2a\u4e00\u4e2a\u6a21\u5757\uff0c\u6211\u4e5f\u6ca1\u6709\u627e\u5230\u662f\u54ea\u4e2a\u8bed\u53e5\u5bfc\u81f4\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : xutl <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @typetraits ok \u975e\u5e38\u611f\u8c22 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : xutl <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @lv2016 \u8c22\u8c22 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : linxy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5f00 gdb \u80fd\u8dd1\u4e48 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : xutl <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @linxy \u80fd\u8dd1 \u5c31\u662f\u6bcf\u6b21 crash \u7684\u4f4d\u7f6e\u90fd\u4e0d\u4e00\u6837 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dahakawang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u91cc\u7684\u90fd\u8bd5\u8fc7\u4e48\uff1f
    https:\/\/gcc.gnu.org\/onlinedocs\/gcc\/Optimize-Options.html#Optimize-Options <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : xutl <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dahakawang
    \u6211\u90fd\u8bd5\u8fc7\u4e86\u3002<\/p>\n

    @typetraits
    \u6211\u5c06-O1 \u6bd4-O0 \u591a\u7684\u4f18\u5316\u9009\u9879\u6458\u4e86\u51fa\u6765\uff0c\u7136\u540e\u53bb\u6389-O1 \u4f18\u5316\uff0c\u7528\u6458\u51fa\u6765\u7684\u4f18\u5316\u9009\u9879\u66ff\u4ee3\uff0c\u4e0d\u4f1a crash \u3002\u5728\u6240\u6709\u4f18\u5316\u9009\u9879\u524d\u52a0\u4e0a-O1\uff0c\u7a0b\u5e8f\u5c31\u4f1a crash \u3002\u6211\u731c\u6d4b\uff0c-O1 \u5e76\u4e0d\u53ea\u6709\u4f7f\u7528\u4f60\u53d1\u7684\u8fd9\u4e9b\u4f18\u5316\u9009\u9879\uff0c\u8fd8\u53ef\u80fd\u5b58\u5728\u5176\u4ed6\u4f18\u5316\uff0c\u6211\u6ca1\u6709\u5728\u6587\u6863\u4e2d\u627e\u5230\u3002\u7ecf\u8fc7\u76ee\u524d\u6392\u67e5\uff0c\u6211\u6000\u7591\u5e94\u8be5\u662f\u6a21\u5757\u5185\u90e8\u5185\u5b58\u6709\u95ee\u9898\uff0c\u78b0\u5de7\u5728\u4f7f\u7528 gcc9+mingw \u73af\u5883\u4e0b\u88ab\u89e6\u53d1\u4e86\u3002\u4f46\u662f\u76ee\u524d\u6ca1\u6709\u627e\u5230\u5b9a\u4f4d\u95ee\u9898\u7684\u65b9\u6cd5\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : typetraits <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @xutl #10 \u4e0a gdb \u770b\u4e00\u4e0b-O1 crash \u5728\u54ea\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : xutl <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @typetraits \u6211\u770b\u4e86\uff0ccrash \u5728\u7c7b\u6784\u9020\u51fd\u6570\u91cc\u9762\uff0c\u6784\u9020\u51fd\u6570\u5168\u662f\u521d\u59cb\u5316\u64cd\u4f5c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u6c42\u95ee gcc9 \u4e2d-O1 \u6bd4-O0…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/187667"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=187667"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/187667\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=187667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=187667"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=187667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}