Displaying 3 results from an estimated 3 matches for "icy8kulwwjzqpxbxvouhhpkyxbnntzpgvn".
2017 Jul 17
2
A bug related with undef value when bootstrap MemorySSA.cpp
...her undef folks]
This is the same bug as https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.llvm.org%2Fshow_bug.cgi%3Fid%3D31652&data=02%7C01%7Cnlopes%40microsoft.com%7C971ae2063c8b420d2f1008d4cbec8f22%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636357664258073352&sdata=iCy8kUlWwJzQpXbXvOuhHpKyXBnntZPGvn%2FtxWsqun8%3D&reserved=0.
The short answer here is that the loop unswitch transform and the GVN transform are justified via conflicting specifications of undef (that is, LoopUnswitch and GVN don't agree on the definition of undef). The
long(er) answer is in the bug.
Unfortunately, there i...
2017 Jul 16
2
A bug related with undef value when bootstrap MemorySSA.cpp
This is a bug found by internal compiler bootstrap, and possibly it is
the root cause of https://bugs.llvm.org/show_bug.cgi?id=33652 and
https://bugs.llvm.org/show_bug.cgi?id=33626.
Here is the testcase 1.c. The original code is at MemorySSA.cpp:586
for rL307764.
------------------------- 1.c ---------------------------
long a, c, d, e, f, m, cnt, i_hasval;
volatile long b;
void goo(long);
void
2017 Jul 17
2
A bug related with undef value when bootstrap MemorySSA.cpp
The issue blocks another optimization patch and Wei has spent huge amount
of effort isolating the the bootstrap failure to this same problem. I agree
with Wei that other developers may also get hit by the same issue and the
cost of leaving this issue open for long can be very high to the community.
David
On Mon, Jul 17, 2017 at 10:01 AM, Wei Mi <wmi at google.com> wrote:
> Sanjoy and