https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65206
Bug ID: 65206
Summary: Vectorized version of loop is removed.
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ysrumyan at gmail dot com
I noticed that vectorized version of loop is deleted although compiler reports
that it was successfully vectorized:
t1.c:7:3: note: LOOP VECTORIZED
but after we can see in vect-dump:
Removing basic block 4
basic block 4, loop depth 1
pred: 45
# i_16 = PHI <i_73(45)>
# ivtmp_15 = PHI <ivtmp_76(45)>
# vectp_a1.11_116 = PHI <vectp_a1.12_114(45)>
# vectp_a2.19_125 = PHI <vectp_a2.20_123(45)>
# vectp_a3.22_130 = PHI <vectp_a3.23_128(45)>
# vectp_a1.25_136 = PHI <vectp_a1.26_134(45)>
# vectp_a3.34_147 = PHI <vectp_a3.35_145(45)>
# ivtmp_38 = PHI <0(45)>
vect__5.13_118 = MEM[(float *)vectp_a1.11_116];
_5 = a1[i_16];
_31 = &a2[i_16];
vect__ifc__32.14_122 = VEC_COND_EXPR <vect__5.13_118 >= vect_cst_.15_119,
vect_cst_.16_120, vect_cst_.17_121>;
_ifc__32 = _5 >= x_6(D) ? 4294967295 : 0;
vect__7.18_127 = MASK_LOAD (vectp_a2.19_125, 0B, vect__ifc__32.14_122);
_7 = 0.0;
_33 = &a3[i_16];
vect__8.21_132 = MASK_LOAD (vectp_a3.22_130, 0B, vect__ifc__32.14_122);
_8 = 0.0;
vect__9.24_133 = vect__7.18_127 + vect__8.21_132;
_9 = _7 + _8;
_34 = &a1[i_16];
MASK_STORE (vectp_a1.25_136, 0B, vect__ifc__32.14_122, vect__9.24_133);
vect__11.27_140 = vect_cst_.28_37 + vect_cst_.29_139;
_11 = x_6(D) + 1.0e+0;
_35 = &a3[i_16];
vect__ifc__36.30_144 = VEC_COND_EXPR <vect__5.13_118 >= vect_cst_.31_141,
vect_cst_.32_142, vect_cst_.33_143>;
_ifc__36 = _5 >= x_6(D) ? 0 : 4294967295;
...
Test and compile options will be attached.
