Bug#805044: gcc-4.9: the option -ftree-vectorizer-verbose does not work

[A Mennucc <mennucc1@debian.org>]

Package: gcc-4.9
Version: 4.9.2-10
Severity: minor

dear mantainers, the option -ftree-vectorizer-verbose does not print anything.

Consider the code in attachment

Try compiling it with the command
# gcc -Ofast -ftree-vectorizer-verbose=6 --std=c99 -msse -c vectorizeme.c

I tried in Debian/Wheezy, gcc --version -> gcc (Debian 4.7.2-5) 4.7.2
and it prints lotsa useful info.

I tried in Debian/Jessi, version as below, and nothing is printed....

It is a pity since -ftree-vectorizer-verbose helped me in the past
optimizing some code, providing impressive speedups.

  a.

ps: I copy pasted the attachment from
 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50680
 that though is a different kind of bug...

-- System Information:
Debian Release: 8.2
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gcc-4.9 depends on:
ii  binutils        2.25-5
ii  cpp-4.9         4.9.2-10
ii  gcc-4.9-base    4.9.2-10
ii  libc6           2.19-18+deb8u1
ii  libcloog-isl4   0.18.2-1+b2
ii  libgcc-4.9-dev  4.9.2-10
ii  libgmp10        2:6.0.0+dfsg-6
ii  libisl10        0.12.2-2
ii  libmpc3         1.0.2-1
ii  libmpfr4        3.1.2-2
ii  zlib1g          1:1.2.8.dfsg-2+b1

Versions of packages gcc-4.9 recommends:
ii  libc6-dev  2.19-18+deb8u1

Versions of packages gcc-4.9 suggests:
pn  gcc-4.9-doc       <none>
pn  gcc-4.9-locales   <none>
pn  gcc-4.9-multilib  <none>
pn  libasan1-dbg      <none>
pn  libatomic1-dbg    <none>
pn  libcilkrts5-dbg   <none>
pn  libgcc1-dbg       <none>
pn  libgomp1-dbg      <none>
pn  libitm1-dbg       <none>
pn  liblsan0-dbg      <none>
pn  libquadmath0-dbg  <none>
pn  libtsan0-dbg      <none>
pn  libubsan0-dbg     <none>

-- no debconf information

-- 
Andrea Mennucc
 "E' un mondo difficile. Che vita intensa!" (Tonino Carotone)

float * __restrict__ x;
float * __restrict__ y;
float * __restrict__ z;

float v1[4],v2[4],v3[4];

struct A {
  float a[4];
};

struct A a1, a2, a3;

void foo ()
{

 float * __restrict__ pin = &x[0];
 float * __restrict__ pout =&y[0];

  *pout++ = *pin++;
  *pout++ = *pin++;
  *pout++ = *pin++;
  *pout++ = *pin++;
}

void voo() {

 float * __restrict__ pin = &v1[0];
 float * __restrict__ pout =&v2[0];

  *pout++ = *pin++;
  *pout++ = *pin++;
  *pout++ = *pin++;
  *pout++ = *pin++;


}

void aoo() {

 float * __restrict__ pin = &a1.a[0];
 float * __restrict__ pout =&a2.a[0];

  *pout++ = *pin++;
  *pout++ = *pin++;
  *pout++ = *pin++;
  *pout++ = *pin++;


}


void loop() {
  for (int i=0;i!=4;++i) x[i]=y[i]+z[i];
}

void voop() {
  for (int i=0;i!=4;++i) v1[i]=v2[i]+v3[i];
}

void aoop() {
  for (int i=0;i!=4;++i) a1.a[i]=a2.a[i]+a3.a[i];
}

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