https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105312
Bug ID: 105312
Summary: attribute__((optimize("-O3")))
stress_matrix_xy_identity compiling stress-ng for arm
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: raj.khem at gmail dot com
Target Milestone: ---
GCC 12 gets into an ICE when compiling this testcase (reduced from stress-ng)
typedef float stress_matrix_type_t;
typedef unsigned int size_t;
static void __attribute__((optimize("-O3"))) stress_matrix_xy_identity(
const size_t n,
stress_matrix_type_t a[restrict n][n],
stress_matrix_type_t b[restrict n][n],
stress_matrix_type_t r[restrict n][n])
{
register size_t i;
(void)a;
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
for (j = 0; j < n; j++)
r[i][j] = (i == j) ? 1.0 : 0.0;
return;
}
}
===============================
arm-yoe-linux-musleabi-gcc -mthumb -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a15
-fstack-protector-strong -D_FORTIFY_SOURCE=2 stress-matrix.i
during GIMPLE pass: isel
stress-matrix.i: In function 'stress_matrix_xy_identity':
stress-matrix.i:3:46: internal compiler error: in gimple_expand_vec_cond_expr,
at gimple-isel.cc:268
3 | static void __attribute__((optimize("-O3"))) stress_matrix_xy_identity(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
0x15d4b28 internal_error(char const*, ...)
???:0
0x6005fb fancy_abort(char const*, int, char const*)
???:0
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