https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113549
Bug ID: 113549
Summary: float simd crash on windows in
gcc.dg/vect/vect-simd-clone-16b.c
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: nightstrike at gmail dot com
Target Milestone: ---
Created attachment 57187
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57187&action=edit
Assembly output
The vect-simd-clone-16b.c test runs the vect-simd-clone-16.c test with the TYPE
set to float. The default type is int, which works fine. Reducing that
testcase yields the following:
```
#define TYPE float
#pragma omp declare simd inbranch
TYPE __attribute__((noinline))
foo (TYPE a)
{
return a + 1;
}
void
masked_fixed (TYPE * a, TYPE * b)
{
#pragma omp simd
for (int i = 0; i < 128; i++)
b[i] = a[i]<1 ? foo(a[i]) : a[i];
}
int main() {
TYPE a[1024] = {0};
TYPE b[1024] = {0};
masked_fixed(a, b);
return 0;
}
```
The noipa attribute and the __restrict keywords were removed from masked_fixed.
noinline is required on foo.
Minimal set of compile arguments required to trigger the problem:
$ x86_64-w64-mingw32-gcc a.c -fopenmp-simd -O2 -mavx
Note that dropping to -01 or removing -mavx avoids the crash.
Assembly from -save-temps -fverbose-asm attached.
This is technically running under wine 8.0. This is the backtrace provided by
wine:
```
wine: Unhandled page fault on read access to FFFFFFFFFFFFFFFF at address
000000014000163F (thread 0024), starting debugger...
Unhandled exception: page fault on read access to 0xffffffffffffffff in 64-bit
code (0x0000014000163f).
Register dump:
rip:000000014000163f rsp:000000000021dc50 rbp:000000000021dcd0 eflags:00010246
( R- -- I Z- -P- )
rax:0000000000000000 rbx:0000000000000000 rcx:000000000021dcf0
rdx:000000000021dcd0
rsi:000000000021ed70 rdi:000000000021dd70 r8:000000000021dcb0
r9:0000000000c92000 r10:0000000000c90330
r11:0000000000000000 r12:000000000021dcb0 r13:000000000021dcf0
r14:0000000000000000 r15:0000000000000000
Stack dump:
0x0000000021dc50: 0000000000000000 0000000000000000
0x0000000021dc60: 0000000000000000 0000000000000000
0x0000000021dc70: 0000000000000000 0000000000000000
0x0000000021dc80: 0000000000000000 0000000000000000
0x0000000021dc90: 0000000000000000 0000000000000000
0x0000000021dca0: 0000000000000000 0000000000000000
0x0000000021dcb0: 0000000000000000 0000000000000000
0x0000000021dcc0: 0000000000000000 0000000000000000
0x0000000021dcd0: 0000000000000000 0000000000000000
0x0000000021dce0: 0000000000000000 0000000000000000
0x0000000021dcf0: 0000000000000000 0000000000000000
0x0000000021dd00: 0000000000000000 0000000000000000
Backtrace:
=>0 0x0000014000163f in a (+0x163f) (0x0000000021dcd0)
1 0x00000140003384 in a (+0x3384) (0x0000000021fdf0)
2 0x00000140001340 in a (+0x1340) (0x0000000021fdf0)
3 0x00000140001146 in a (+0x1146) (0x0000000021fe30)
4 0x0000007b647b51 BaseThreadInitThunk+0x11(unknown=<internal error>,
entry=<internal error>, arg=<internal error>)
[H:\home\user\p\gcc\src\wine-8.0-rc4p2p3\dlls\kernel32\thread.c:61] in kernel32
(0x00000
00021fe60)
0x0000014000163f a+0x163f: ldsl %esp,%edi
```
