#include <immintrin.h>
#pragma GCC target ("no-avx")
__m256d a, b, c;
__m128d d, e, f;
void __attribute__ ((__target__ ("avx"), __noinline__))
avx_routine (void)
{
a = _mm256_andnot_pd (b, c);
}
void __attribute__ ((__target__ ("sse3"), __noinline__))
sse3_routine (void)
{
d = _mm_andnot_pd (d, e);
}
ICEs when compiled with -O2 -mavx:
include/avxintrin.h: In function 'avx_routine':
include/avxintrin.h:155: error: '__builtin_ia32_andnpd256' needs unknown isa
option
include/avxintrin.h:155: internal compiler error: in emit_move_insn, at
expr.c:3405
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
One issue is the unknown ISA option which can be cured by:
--- i386.c.jj22009-04-14 16:33:49.000000000 +0200
+++ i386.c2009-04-16 20:47:05.000000000 +0200
@@ -2350,6 +2350,7 @@ ix86_target_string (int isa, int flags,
static struct ix86_target_opts isa_opts[] =
{
{ "-m64",OPTION_MASK_ISA_64BIT },
+ { "-mavx",OPTION_MASK_ISA_AVX },
{ "-msse5",OPTION_MASK_ISA_SSE5 },
{ "-msse4a",OPTION_MASK_ISA_SSE4A },
{ "-msse4.2",OPTION_MASK_ISA_SSE4_2 },
@@ -2365,6 +2366,7 @@ ix86_target_string (int isa, int flags,
{ "-mpopcnt",OPTION_MASK_ISA_POPCNT },
{ "-maes",OPTION_MASK_ISA_AES },
{ "-mpclmul",OPTION_MASK_ISA_PCLMUL },
+ { "-mfma",OPTION_MASK_ISA_FMA }
};
/* Flag options. */
But the worse problem is that ix86_valid_target_attribute_tree when the new
ix86_isa_flags is the same as def->ix86_isa_flags will just return NULL, which
means ix86_isa_flags won't be restored to the state with -mavx enabled when
switching to the avx_routine function.
I get a different ICE with:
-void __attribute__ ((__target__ ("avx"), __noinline__))
+void __attribute__ ((__target__ ("tune=core2", "avx"), __noinline__))
change on the testcase, this time without any reported error.
--
Summary: ICE with #pragma GCC target
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jakub at gcc dot gnu dot org
GCC target triplet: x86_64-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39787
