Consider the following two functions:
int foo() { return 1; }
void bar() {}
Disassembly when compiled with gcc 2.95.2: (-Os)
00000000 <foo(void)>:
0: 38 60 00 01 li r3,1
4: 4e 80 00 20 blr
00000008 <bar(void)>:
8: 4e 80 00 20 blr
Disassembly when compiled with gcc 4.1.1: (-Os)
00000000 <foo()>:
0: 94 21 ff f0 stwu r1,-16(r1)
4: 38 60 00 01 li r3,1
8: 38 21 00 10 addi r1,r1,16
c: 4e 80 00 20 blr
00000010 <bar()>:
10: 94 21 ff f0 stwu r1,-16(r1)
14: 38 21 00 10 addi r1,r1,16
18: 4e 80 00 20 blr
--
Summary: Stack pointer is modified in functions that don't use
the stack
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: regression
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: atgraham at gmail dot com
GCC host triplet: i686
GCC target triplet: powerpc-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29248
