http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49742
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011.07.15 00:16:49
Ever Confirmed|0 |1
--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2011-07-15
00:16:49 UTC ---
Before jumping in to the target I'm not sure I totally understand what the tree
optimizers are doing here.
Why are the tree level forms producing ...
vect_array.21_I_lsm0.31_37 = vect_array.21[0];
dump_tree_optimized shows :
unsigned int in.53;
unsigned int D.3755;
void * D.3750;
unsigned int D.3748;
int[8] * D.3749;
void * D.3744;
unsigned int ivtmp.37;
unsigned int ivtmp.33;
vector(2) int vect_array.21_I_lsm0.31;
vector(2) int * vect_pout2.26;
vector(2) int vect_array.21[4];
vector(2) int vect_var_.12;
vector(2) int vect_var_.11;
vector(2) int vect_var_.10;
vector(2) int vect_var_.9;
<bb 2>:
vect_array.21_I_lsm0.31_37 = vect_array.21[0];
ivtmp.33_59 = (unsigned int) &in[8];
ivtmp.37_4 = (unsigned int) &out[8];
in.53_75 = (unsigned int) ∈
D.3755_76 = in.53_75 + 2080;
<bb 3>:
# vect_pout2.26_63 = PHI <vect_pout2.26_64(3), &out2(2)>
# ivtmp.33_31 = PHI <ivtmp.33_3(3), ivtmp.33_59(2)>
# ivtmp.37_60 = PHI <ivtmp.37_61(3), ivtmp.37_4(2)>
D.3748_12 = ivtmp.33_31 + 4294967264;
D.3749_13 = (int[8] *) D.3748_12;
D.3744_6 = (void *) ivtmp.33_31;
vect_var_.9_42 = MEM[base: D.3744_6, offset: 4294967264B];
vect_var_.10_44 = MEM[base: D.3744_6, offset: 4294967272B];
vect_var_.11_46 = MEM[base: D.3744_6, offset: 4294967280B];
vect_var_.12_48 = MEM[base: D.3744_6, offset: 4294967288B];
vect_array.21 = LOAD_LANES (MEM[(int[512] *)D.3749_13]);
D.3750_21 = (void *) ivtmp.37_60;
MEM[base: D.3750_21, offset: 4294967264B] = vect_var_.9_42;
MEM[base: D.3750_21, offset: 4294967272B] = vect_var_.10_44;
MEM[base: D.3750_21, offset: 4294967280B] = vect_var_.11_46;
MEM[base: D.3750_21, offset: 4294967288B] = vect_var_.12_48;
MEM[base: vect_pout2.26_63, offset: 0B] = vect_array.21_I_lsm0.31_37;
vect_pout2.26_64 = vect_pout2.26_63 + 8;
ivtmp.33_3 = ivtmp.33_31 + 32;
ivtmp.37_61 = ivtmp.37_60 + 32;
if (ivtmp.33_3 != D.3755_76)
goto <bb 3>;
else
goto <bb 4>;
<bb 4>:
return;
Look at vect_array.21_I_lsm0.31_37 - it's being initialized even before
vect_array.21 has been ! I'm not sure I quite follow the transformations here
till this point.
Ramana
