https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101428
Bug ID: 101428
Summary: [10/11/12 Regression] ICE: 'asm' clobber conflict with
output operand
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: aarch64-linux-gnu
gcc-12.0.0-alpha20210711 snapshot (g:269256f33c51222167ad461f775d5468bb5ecaf5)
ICEs when compiling the following testcase, extracted from
test/CodeGen/inline-asm-x86-flag-output.c from the clang 12.0.0 test suite:
int test_ccge(long nr, volatile long *addr) {
int x;
asm("cmp %2,%1"
: "=@ccge"(x), "=m"(*(volatile long *)(addr))
: "r"(nr)
: "cc");
if (x)
return 0;
return 1;
}
% aarch64-linux-gnu-gcc-12.0.0 -c dwwjjifx.c
during RTL pass: expand
dwwjjifx.c: In function 'test_ccge':
dwwjjifx.c:3:3: internal compiler error: 'asm' clobber conflict with output
operand
3 | asm("cmp %2,%1"
| ^~~
0xa35e46 expand_asm_stmt
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210711/work/gcc-12-20210711/gcc/cfgexpand.c:3603
0xa3a640 expand_gimple_stmt_1
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210711/work/gcc-12-20210711/gcc/cfgexpand.c:3874
0xa3a640 expand_gimple_stmt
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210711/work/gcc-12-20210711/gcc/cfgexpand.c:4041
0xa41036 expand_gimple_basic_block
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210711/work/gcc-12-20210711/gcc/cfgexpand.c:6083
0xa42de7 execute
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210711/work/gcc-12-20210711/gcc/cfgexpand.c:6809
(if it really makes sense to file PRs for this type of ICEs, of course.)
