https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66959
Bug ID: 66959
Summary: Bad code generated for union type punning of NEON
intrinsic types on ARM64
Product: gcc
Version: 4.9.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dpb at corrigendum dot ru
Target Milestone: ---
Created attachment 36024
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36024&action=edit
Original source
Original and preprocessed source attached.
$ gcc -dumpmachine
aarch64-linux-gnu
$ gcc -O0 -std=c11 test.c && ./a.out ; echo $?
0
$ gcc -O1 -std=c11 test.c && ./a.out ; echo $?
1
Reproduced with 4.9.3 and the head of the 4.9 branch. Couldn't reproduce on
trunk.
