Not 100% sure whether this is the preferred fix, but gcc.dg/vect/pr56787.c
has lots of float * parameters that point who-knows-where and so is only
vectorised if the target supports misaligned vector accesses:
void
foo (unsigned long n, const float *__restrict u0,
const float *__restrict u1, const float *__restrict u2,
const float *__restrict u3, const float *__restrict u4,
const float *__restrict s0, const float *__restrict s1,
const float *__restrict s2, float *__restrict t3,
float *__restrict t4)
{
unsigned long i;
for (i = 0; i < n; i++)
{
float u[5], f[3][5];
u[0] = u0[i]; u[1] = u1[i]; u[2] = u2[i]; u[3] = u3[i]; u[4] = u4[i];
bar (u, f);
t3[i] = s0[i] * f[0][3] + s1[i] * f[1][3] + s2[i] * f[2][3];
}
}
MIPS paired-single doesn't have any form of vector misalignment.
I suppose it would be technically possible to use misaligned
integer accesses and an FPR<->GPR move, but that can be expensive.
I also don't have any hardware to benchmark it on.
So this patch adds an xfail for vect_no_align. Tested on mipsisa64-sde-elf.
OK to install?
Thanks,
Richard
gcc/testsuite/
* gcc.dg/vect/pr56787.c: Mark as xfail for vect_no_align.
Index: gcc/testsuite/gcc.dg/vect/pr56787.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr56787.c 2014-02-10 20:26:03.870867802 +0000
+++ gcc/testsuite/gcc.dg/vect/pr56787.c 2014-02-10 20:36:42.072279177 +0000
@@ -31,5 +31,5 @@ foo (unsigned long n, const float *__res
}
}
-/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" } } */
+/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" { xfail
vect_no_align } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */
