[llvm-bugs] [Bug 33706] New: [Loop vectorizer] miscompile since r272715
llvm-bugs at lists.llvm.org
Thu Jul 6 19:07:44 PDT 2017
Bug ID: 33706
Summary: [Loop vectorizer] miscompile since r272715
Component: Loop Optimizer
Assignee: unassignedbugs at nondot.org
Reporter: Wolfgang_Pieb at playstation.sony.com
CC: llvm-bugs at lists.llvm.org
Created attachment 18763
test case (different output with -O2 vs. -O0).
The attached test case produces different output for -O2 vs. -O0 compilation,
which we bisected down to the loop vectorizer. The failure started with
r272715, but appears to be masked whenever the GVNHoist pass is enabled (which
it currently isn't at r307289).
Apologies for not providing a more narrowed test case with opt/llc, but opt
resisted my attempts to find a set of switches that reproduces the failure.
clang -O2 --target=x86_64-unknown-linux-gnu
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the llvm-bugs