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[Bug inline-asm/68843] New: ICE with "u" input constraint
- From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 10 Dec 2015 18:07:45 +0000
- Subject: [Bug inline-asm/68843] New: ICE with "u" input constraint
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68843
Bug ID: 68843
Summary: ICE with "u" input constraint
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: bernd.edlinger at hotmail dot de
Target Milestone: ---
Hi,
I have just played a bit with 80x87 fpu register constraints, and found an ICE:
cat t1.c
double test()
{
double x,y;
asm ("# %0 %1 %2" : "=&t" (x) : "f" (x), "u" (y));
return x;
}
gcc -O -S t1.c
t1.c: In function 'test':
t1.c:6:1: internal compiler error: in change_stack, at reg-stack.c:2522
}
^
0xa934a3 change_stack
../../gcc-trunk/gcc/reg-stack.c:2522
0xa93b62 subst_asm_stack_regs
../../gcc-trunk/gcc/reg-stack.c:2125
0xa95ead subst_stack_regs
../../gcc-trunk/gcc/reg-stack.c:2302
0xa960ed convert_regs_1
../../gcc-trunk/gcc/reg-stack.c:2951
0xa960ed convert_regs_2
../../gcc-trunk/gcc/reg-stack.c:3086
0xa96f5a convert_regs
../../gcc-trunk/gcc/reg-stack.c:3121
0xa96f5a reg_to_stack
../../gcc-trunk/gcc/reg-stack.c:3250
0xa96f5a rest_of_handle_stack_regs
../../gcc-trunk/gcc/reg-stack.c:3305
0xa96f5a execute
../../gcc-trunk/gcc/reg-stack.c:3336
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
and same result for:
cat t2.c
double test()
{
double x,y;
asm ("# %0 %1 %2" : "=&r" (x) : "r" (x), "u" (y));
return x;
}