https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115352 Bug ID: 115352 Summary: wrong code with _BitInt() __builtin_sub_overflow_p() at -O0 Product: gcc Version: 15.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at ...
Large values of N will result in a stack overflow error. Note that there is one test, namly vtfhe::tests::test_blind_rot, which is flaky because the parameters are not large enough to always account for the rounding error introduced by the mod switch. To reproduce the results from the...
Linus Torvalds最近以拉动请求为主流新闻.这个拉取请求包含一个函数,overflow_usub它显然是非标准的并且使用某种编译魔术.由于这种咆哮的广泛报道,几乎不可能找到关于这个功能的任何有用信息.我的问题是:什么是什么overflow_usub,何时应该使用它需要什么样的编译器魔术?
在ULP 中使用 SUB 指令进行一个正数减去一个负数的操作,会产生 ALU overflow,按理 SUB 指令进行的是有符号的运算,应该不会产生 ALU overflow. 在ULP 中添加如下代码即可复现: Code: Select all move r2, 1 sub r2, r2, -1 jump wake_up, ov 说明:使用 SUB 指令完成 1-(-1) 运算,发现会跳转到 wak...
在ULP 中使用 SUB 指令进行一个正数减去一个负数的操作,会产生 ALU overflow,按理 SUB 指令进行的是有符号的运算,应该不会产生 ALU overflow. 在ULP 中添加如下代码即可复现: Code: Select all move r2, 1 sub r2, r2, -1 jump wake_up, ov 说明:使用 SUB 指令完成 1-(-1) 运算,发现会跳转到 wak...
在ULP 中使用 SUB 指令进行一个正数减去一个负数的操作,会产生 ALU overflow,按理 SUB 指令进行的是有符号的运算,应该不会产生 ALU overflow. 在ULP 中添加如下代码即可复现: Code:Select all move r2,1subr2, r2,-1jump wake_up, ov 说明:使用 SUB 指令完成 1-(-1) 运算,发现会跳转到 wake_up 运行...
Force SAVE_EXPR for __builtin_{add,sub,mul}_overflow [PR108789] The following testcase is miscompiled, because we use save_expr on the .{ADD,SUB,MUL}_OVERFLOW call we are creating, but if the first two operands are not INTEGER_CSTs (in that case we just fold it right away) but ...
The utility model provides a horizontal overflow sub-bleaching machine, comprising a plurality of cloth storage containers, chambers which are formed via the connection of selvage guide channels, water pipes which are mutually communicated, a circulating pump, a heat exchanger and existing electrical ...
{add,sub,mul}_overflow and __builtin{add,sub}c [PR108789] The following testcase is miscompiled, because we use save_expr on the .{ADD,SUB,MUL}_OVERFLOW call we are creating, but if the first two operands are not INTEGER_CSTs (in that case we just fold it right away) but are ...
[Bug middle-end/108789] __builtin_(add|mul|sub)_overflow methods generate duplicate operations if both operands are const which in turn causes wrong code due to overlapping arguments jakub at gcc dot gnu.org via Gcc-bugs Tue, 04 Jun 2024 03:33:22 -0700 https://gcc.gnu.org/bugzilla/...