------- Comment #16 from dave at hiauly1 dot hia dot nrc dot ca 2010-09-18
22:14 -------
Subject: Re: [4.6 Regression] FAIL:
gcc.dg/torture/builtin-cproj-1.c -O1 (test for excess errors)
On Sat, 18 Sep 2010, rguenth at gcc dot gnu dot org wrote:
> ------- Comment #14 from rguenth at gcc dot gnu dot org 2010-09-18 18:25
> -------
> You have way more non-SSA variables - possibly due to callee-copy of args
> (again).
I think you are correct about this being a callee-copy problem. Complex
float is passed by value, so a copy is not made. In the 087t.dce2 pass,
the float code is simplified to
if (x_32(D) != 0)
goto <bb 4>;
else
goto <bb 3>;
<bb 3>:
<bb 4>:
Invalid sum of incoming frequencies 10000, should be 5000
# cf$imag_13 = PHI <4.0e+0(2), 5.0e+0(3)>
cf_36 = COMPLEX_EXPR < Inf, cf$imag_13>; D.2130_37 = __builtin_cprojf
(cf_36);
D.2133_152 = IMAGPART_EXPR <D.2130_37>;
D.2134_41 = __builtin_copysignf (1.0e+0, D.2133_152);
if (D.2134_41 != 1.0e+0)
goto <bb 5>;
else
goto <bb 6>;
<bb 5>:
Invalid sum of incoming frequencies 2500, should be 6450
link_error (160);
whereas for double we still have
<bb 6>:
Invalid sum of incoming frequencies 8950, should be 10000
REALPART_EXPR <cd.1> = Inf;
if (x_32(D) != 0)
goto <bb 8>;
else
goto <bb 7>;
<bb 7>:
<bb 8>:
# iftmp.4_14 = PHI <4.0e+0(6), 5.0e+0(7)>
D.2321_122 = REALPART_EXPR <cd.1>;
cd.5_44 = COMPLEX_EXPR <D.2321_122, iftmp.4_14>;
D.2142_45 = __builtin_cproj (cd.5_44); [return slot optimization]
CR.26_84 = REALPART_EXPR <D.2142_45>;
D.2145_85 = IMAGPART_EXPR <D.2142_45>;
D.2325_75 = CR.26_84 >
1.79769313486231570814527423731704356798070567526e+308;
D.2326_76 = !D.2325_75;
D.2327_67 = D.2145_85 != 0.0;
D.2328_60 = D.2327_67 || D.2326_76;
if (D.2328_60 == 1)
goto <bb 10>;
else
goto <bb 9>;
<bb 9>:
D.2146_49 = (float) D.2145_85;
D.2147_50 = __builtin_copysignf (1.0e+0, D.2146_49);
if (D.2147_50 != 1.0e+0)
goto <bb 10>;
else
goto <bb 11>;
<bb 10>:
link_error (160);
In the previous 086t.reassoc1 pass, we still had the non SSA stuff:
<bb 2>:
cld$real_188 = REALPART_EXPR <cld_25(D)>;
cld$imag_189 = IMAGPART_EXPR <cld_25(D)>;
cd$real_177 = REALPART_EXPR <cd_26(D)>;
cd$imag_178 = IMAGPART_EXPR <cd_26(D)>;
cf$real_167 = REALPART_EXPR <cf_29(D)>;
cf$imag_158 = IMAGPART_EXPR <cf_29(D)>;
REALPART_EXPR <cld.0> = cld$real_188;
IMAGPART_EXPR <cld.0> = cld$imag_189;
REALPART_EXPR <cd.1> = cd$real_177;
IMAGPART_EXPR <cd.1> = cd$imag_178;
if (x_32(D) != 0)
goto <bb 4>;
else
goto <bb 3>;
-fno-tree-sra didn't help.
080t.cplxlower makes these partial defintions:
REALPART_EXPR <cld.0> = cld$real_188;
IMAGPART_EXPR <cld.0> = cld$imag_189;
REALPART_EXPR <cd.1> = cd$real_177;
IMAGPART_EXPR <cd.1> = cd$imag_178;
# grep real_188 builtin-cproj-1.c.*
builtin-cproj-1.c.080t.cplxlower: cld$real_188 = REALPART_EXPR <cld_25(D)>;
builtin-cproj-1.c.080t.cplxlower: REALPART_EXPR <cld.0> = cld$real_188;
builtin-cproj-1.c.082t.copyrename3: cld$real_188 = REALPART_EXPR <cld_25(D)>;
builtin-cproj-1.c.082t.copyrename3: REALPART_EXPR <cld.0> = cld$real_188;
builtin-cproj-1.c.083t.dom1: cld$real_188 = REALPART_EXPR <cld_25(D)>;
builtin-cproj-1.c.083t.dom1: REALPART_EXPR <cld.0> = cld$real_188;
builtin-cproj-1.c.084t.phicprop1: cld$real_188 = REALPART_EXPR <cld_25(D)>;
builtin-cproj-1.c.084t.phicprop1: REALPART_EXPR <cld.0> = cld$real_188;
builtin-cproj-1.c.085t.dse1: cld$real_188 = REALPART_EXPR <cld_25(D)>;
builtin-cproj-1.c.085t.dse1: REALPART_EXPR <cld.0> = cld$real_188;
builtin-cproj-1.c.086t.reassoc1: cld$real_188 = REALPART_EXPR <cld_25(D)>;
builtin-cproj-1.c.086t.reassoc1: REALPART_EXPR <cld.0> = cld$real_188;
004t.gimple makes
REALPART_EXPR <cd.1> = Inf;
# grep "REALPART_EXPR <cd.1>" builtin-cproj-1.c.*
builtin-cproj-1.c.004t.gimple: REALPART_EXPR <cd.1> = Inf;
builtin-cproj-1.c.004t.gimple: REALPART_EXPR <cd.1> = -Inf;
builtin-cproj-1.c.004t.gimple: REALPART_EXPR <cd.1> = Inf;
builtin-cproj-1.c.004t.gimple: REALPART_EXPR <cd.1> = -Inf;
builtin-cproj-1.c.009t.omplower: REALPART_EXPR <cd.1> = Inf;
builtin-cproj-1.c.009t.omplower: REALPART_EXPR <cd.1> = -Inf;
builtin-cproj-1.c.009t.omplower: REALPART_EXPR <cd.1> = Inf;
builtin-cproj-1.c.009t.omplower: REALPART_EXPR <cd.1> = -Inf;
...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43959
