WHen generating code, the compiler adds unnecessary '.align 2' assembeler
directives (where '.align 2' means align on a four byte boundary). This
results in extra padding being added between functions.
This occurs even when -fno-align-functions & -fno-align-labels are specified.
Richard Earnshaw [richard.earns...@arm.com] has confirmed that this is an issue
and requested that I raise it in bugzilla.
In the attached example (test.c), it can be seen in the generated assembly file
(test-align-thumb.s) that various .align 2 statements appear.
Command line was:
arm-none-eabi-gcc test.c -Os -S -mthumb -fno-align-functions -fno-align-labels
-o test-align-thumb.s
--
Summary: GCC/THUMB generates unnecessary padding between
functions
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: daniel dot sherwood at sepura dot com
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-mingw32
GCC target triplet: arm-none-eabi
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38571
