https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70370
Bug ID: 70370
Summary: ICE in execute_todo, at passes.c:2003 when using
__real__ or __imag__ as lvalue in asm
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: clyon at gcc dot gnu.org
Target Milestone: ---
Target: aarch64
Created attachment 38065
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38065&action=edit
testcase
The attached test case causes:
fam-asm.c: In function 'fcs':
fam-asm.c:24:1: internal compiler error: in execute_todo, at passes.c:2003
}
^
0xc99467 execute_todo
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/passes.c:2003
When compiled with -S -O2 with aarch64-none-linux-gnu-gcc.
Note that the asm statement writes a Complex, using __real__ and __imag__ as
lvalues.
Modifying the testcase avoids the crash:
- adding declarations:
float* p_ri = &(__imag__ r);
float* p_rr = &(__real__ r);
- changing the asm such that it writes to:
[rr] "=w" (*p_rr), [ri] "=w" (*p_ri)
instead of:
[rr] "=w" (__real__ r), [ri] "=w" (__imag__ r)
