https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88343
Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
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CC| |amodra at gmail dot com
--- Comment #23 from Alan Modra <amodra at gmail dot com> ---
On master, something as simple as
extern int foo (int);
int f1 (int x) { return foo (x); }
compiled with -S -m32 -mbig -fpic -O2 results in a use of r30 without saving.
f1:
.LFB0:
.cfi_startproc
mflr 0
.cfi_register 65, 0
bcl 20,31,.L2
.L2:
stwu 1,-16(1)
.cfi_def_cfa_offset 16
mflr 30
addis 30,30,_GLOBAL_OFFSET_TABLE_-.L2@ha
addi 30,30,_GLOBAL_OFFSET_TABLE_-.L2@l
stw 0,20(1)
.cfi_offset 65, 4
bl foo@plt
lwz 0,20(1)
addi 1,1,16
.cfi_def_cfa_offset 0
mtlr 0
.cfi_restore 65
blr
.cfi_endproc
