digitalmars.D.bugs - [Issue 21584] New: dmd -O causes incorrect output
- d-bugmail puremagic.com (42/42) Jan 25 2021 https://issues.dlang.org/show_bug.cgi?id=21584
https://issues.dlang.org/show_bug.cgi?id=21584 Issue ID: 21584 Summary: dmd -O causes incorrect output Product: D Version: D2 Hardware: x86_64 OS: Linux Status: NEW Severity: major Priority: P1 Component: dmd Assignee: nobody puremagic.com Reporter: saurabh.das gmail.com I'm seeing what appears to be a bug with the -O flag in dmd. Here is a reduced test case: struct SomeStruct { long value; } bool isNumberOne(int i) { SomeStruct l; if(i == 1) l = SomeStruct(10); return (l == SomeStruct(10)); } void main() { if (!isNumberOne(1)) assert(false); } See: https://run.dlang.io/is/zlrDvy The assert trips when run with "rdmd -O test.d" and it does not trip when run with "rdmd test.d". This bug is observed in all compiler versions from dmd-2.060 through to dmd-2.095. Forum discussion: https://forum.dlang.org/post/dpwzsxjksoqjzjvrwehw forum.dlang.org Thanks, Saurabh --
Jan 25 2021