http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50813
Bug #: 50813
Summary: gcc.dg/torture/vshuf-{v4di,v8si}.c fail on AVX target
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: ubiz...@gmail.com
CC: ja...@gcc.gnu.org, r...@gcc.gnu.org
Target: x86-avx
Recent failure on AVX targets [1].
These two testcases try to generate avx2_permv2ti insn, which is disabled on
non-AVX2 targets:
(define_insn "avx2_permv2ti"
[(set (match_operand:V4DI 0 "register_operand" "=x")
(unspec:V4DI
[(match_operand:V4DI 1 "register_operand" "x")
(match_operand:V4DI 2 "nonimmediate_operand" "xm")
(match_operand:SI 3 "const_0_to_255_operand" "n")]
UNSPEC_VPERMTI))]
"TARGET_AVX2"
"vperm2i128\t{%3, %2, %1, %0|%0, %1, %2, %3}"
[(set_attr "type" "sselog")
(set_attr "prefix" "vex")
(set_attr "mode" "OI")])
The pattern is generated through ix86_vectorize_builtin_vec_perm_ok via:
Breakpoint 1, gen_avx2_permv2ti (operand0=0x7ffff15862e0,
operand1=0x7ffff15862a0, operand2=0x7ffff15862c0, operand3=0x7ffff1997670)
at insn-emit.c:14480
14480 {
(gdb) bt
#0 gen_avx2_permv2ti (operand0=0x7ffff15862e0, operand1=0x7ffff15862a0,
operand2=0x7ffff15862c0, operand3=0x7ffff1997670) at insn-emit.c:14480
#1 0x0000000000adca70 in expand_vec_perm_even_odd_1 (d=0x7fffffffdda0, odd=0)
at /home/uros/gcc-svn/trunk/gcc/config/i386/i386.c:36132
#2 0x0000000000adcdda in expand_vec_perm_even_odd (d=0x7fffffffdda0)
at /home/uros/gcc-svn/trunk/gcc/config/i386/i386.c:36201
#3 0x0000000000add743 in ix86_expand_vec_perm_builtin_1 (d=0x7fffffffdda0)
at /home/uros/gcc-svn/trunk/gcc/config/i386/i386.c:36456
#4 0x0000000000adecdc in ix86_vectorize_builtin_vec_perm_ok (
vec_type=0x7ffff1ac65e8, mask=0x7ffff1b132a0)
at /home/uros/gcc-svn/trunk/gcc/config/i386/i386.c:36776
#5 0x00000000007c89a3 in can_vec_perm_expr_p (type=0x7ffff1ac65e8,
sel=0x7ffff1b132a0) at /home/uros/gcc-svn/trunk/gcc/optabs.c:6717
[1] http://gcc.gnu.org/ml/gcc-testresults/2011-10/msg02319.html
