https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89012
Bug ID: 89012
Summary: SH2 (FDPIC) duplicate symbols in generated assembly.
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: me at zv dot io
Target Milestone: ---
Code generated by gcc targeting `sh2eb-linux-musl` occasionally
contains duplicate symbols with optimization level `O2` or above
and produces the following errors during assembly:
$ gcc -c -mfdpic -O2 -Wno-int-conversion mintest.c
mintest.s: Assembler messages:
mintest.s:44: Error: symbol `.LPCS0' is already defined
This also occurs when the target is `sh2-linux-musl` but when it
specifically does not target `sh4` (even FDPIC). It does not
occur at optimization levels `O0` or `O1`.
I am using GCC with the following configuration, however, this
may also occur with 7.3.0 (unverified):
GCC : 8.2.0
binutils : 2.31.1
musl : git-39ef61 (2018-11-19)
a minimal test case:
/* mintest.c */
int a, b, c, d;
int *e = (void *)0;
void f ()
{
for (; d;)
{
if (b) c = a;
e = e[0] = 1 << c;
}
}
the assembly contains:
.LPCS0:
mov.l @r2,r0
mov.l r0,@r1
mov.l @r3,r2
tst r2,r2
bt.s .L5
mov r0,r1
.LPCS0:
mov.l r0,@r2
mov.l r0,@r1
mov.l @r3,r2
tst r2,r2
bf.s .L2
mov r0,r1
I could not reproduce this under 6.4.0 or 7.3.0 with binutils of
2.30 (the .LPCS0 sections are not present in the assembly).
