http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53114
Bug #: 53114
Summary: Extra load store/instructions compared to gcc-3.4 on
ARM
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: mr.kayr...@gmail.com
Created attachment 27236
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27236
Shell sort function
Hi guys,
I have a test case (shell sort, see attached) compiled with different
ARM compilers:
GCC-4.6.3, GCC-3.4.6, and ARMCC.
Both ARMCC and GCC-3.4.6 generate quite optimal assembly while GCC-4.6.3
inserts extra load/store instructions compared to the other compilers.
Can the SSA representation usage in modern GCC be the reason for this?
If so, has anyone tried to do something about it?
% armcc
ARM C/C++ Compiler, 4.1 [Build 713]
The file has been compiled with following options:
for GCC:
-O3
for ARMCC:
-O3 -Otime
