https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78444
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
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CC| |ubizjak at gmail dot com
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
For some reason, the expansion of call in llvm::cl::parser<unsigned
int>::~parser() doesn't update x_rtl->preferred_stack_boundary. Putting a
breakpoint at expand_call, we get:
Breakpoint 6, expand_call (exp=0x7ffff0ccaaf0, target=0x0, ignore=1) at
/home/uros/gcc-svn/trunk/gcc/calls.c:3232
3232 rtx_insn *normal_call_insns = NULL;
(gdb) p x_rtl->preferred_stack_boundary
$7 = 64
(gdb) fin
Run till exit from #0 expand_call (exp=0x7ffff0ccaaf0, target=0x0, ignore=1)
at /home/uros/gcc-svn/trunk/gcc/calls.c:3232
expand_expr_real_1 (exp=0x7ffff0ccaaf0, target=0x0, tmode=E_VOIDmode,
modifier=EXPAND_NORMAL, alt_rtl=0x0,
inner_reference_p=false) at /home/uros/gcc-svn/trunk/gcc/expr.c:10947
10947 return expand_call (exp, target, ignore);
Value returned is $8 = (rtx_def *) 0x7ffff0b29490
(gdb) p x_rtl->preferred_stack_boundary
$9 = 64
The same for x86_64-linux:
Breakpoint 5, expand_call (exp=0x7ffff0cca690, target=0x0, ignore=1) at
/home/uros/gcc-svn/trunk/gcc/tree.h:3153
3153 if (TREE_CODE (__t) != __c)
(gdb) p x_rtl->preferred_stack_boundary
$12 = 64
(gdb) fin
Run till exit from #0 expand_call (exp=0x7ffff0cca690, target=0x0, ignore=1)
at /home/uros/gcc-svn/trunk/gcc/tree.h:3153
expand_expr_real_1 (exp=0x7ffff0cca690, target=0x0, tmode=E_VOIDmode,
modifier=EXPAND_NORMAL, alt_rtl=0x0,
inner_reference_p=false) at /home/uros/gcc-svn/trunk/gcc/expr.c:10947
10947 return expand_call (exp, target, ignore);
Value returned is $13 = (rtx_def *) 0x7ffff0b29490
(gdb) p x_rtl->preferred_stack_boundary
$14 = 128
