https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77835
Bug ID: 77835
Summary: -O2 -pg -m32 overwrites saved lr with bogus value
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sch...@linux-m68k.org
Target Milestone: ---
Target: powerpc-*-*
When compiling with -O2 -pg the compiler is saving lr twice, once before
_mcount, a second time after it (where it overwrites the saved value with a
bogus one).
$ echo 'int foo (int x) { return x; }' | gcc -O2 -pg -S -m32 -xc - -o -
.file ""
.machine power4
.section ".text"
.align 2
.p2align 4,,15
.globl foo
.type foo, @function
foo:
mflr 0
stw 0,4(1)
bl _mcount
stwu 1,-16(1)
mflr 0
stw 0,20(1)
ori 2,2,0
lwz 0,20(1)
addi 1,1,16
mtlr 0
blr
.size foo,.-foo
.ident "GCC: (GNU) 7.0.0 20161002 (experimental) [trunk revision
240699]"
.section .note.GNU-stack,"",@progbits
