Bug 15316 – struct float fields not correctly initialised on x64

http://dpaste.dzfl.pl/547374e4d630 struct A { float floo; }; void main() { A x = A.init; assert(x is x.init); // okay A y; assert(y is y.init); // fails }; Seems to work fine on x32, but fails on x64. Note that x64 codegen uses SSE, while x32 doesn't. doubles are also affected, but NOT reals: http://dpaste.dzfl.pl/b60adf79b79f

Blocks: https://github.com/D-Programming-Language/phobos/pull/3797

*** Issue 16105 has been marked as a duplicate of this issue. ***

*** This issue has been marked as a duplicate of issue 9813 ***

Commits pushed to stable at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/3bed8dfd33dffb40dc2fbb5850ebc26bccc3888f fix gdc-dmd test - remove the workound for Issue 15316 - we can't really solve Issue 15316 w/ signaling NaNs b/c any optimization, copying et.al. might turn signaling into quiet NaNs, therefor we want to solve Issue 15316 by switching Float.init to use quiet NaNs - the workaround depends on a specific dmd bug (see #6163) that looses SNaNs when writing struct initializers but keeps them for Float.init - this workaround might not be portable to GDC/LDC and will easily break w/ slightly different dmd optimizations (it's responsible for the test failure of the gdc-built dmd) - this PR will reopen https://issues.dlang.org/show_bug.cgi?id=11135 this partially reverts commit 0efa1d3bf92bcaa6c4a99cad0b574185a537906a https://github.com/dlang/phobos/commit/50a264628f411d41acec522e0f70fe6677ffd0c8 Merge pull request #4844 from MartinNowak/revert_3797 fix gdc-dmd test - remove the workound for Issue 15316

Commits pushed to master at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/3bed8dfd33dffb40dc2fbb5850ebc26bccc3888f fix gdc-dmd test - remove the workound for Issue 15316 https://github.com/dlang/phobos/commit/50a264628f411d41acec522e0f70fe6677ffd0c8 Merge pull request #4844 from MartinNowak/revert_3797