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rs6000.md (insvsi_internal1): Subtract shift from the mask end.

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* config/rs6000/rs6000.md (insvsi_internal1): Subtract shift from
       the mask end.
       * g++.dg/opt/20050511-1.C: New test.

From-SVN: r99936
This commit is contained in:
Devang Patel 2005-05-18 16:54:36 -07:00 • committed by Devang Patel
parent 5bcd864416
commit 46e5b15ed4
4 changed files with 74 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2005-05-18 Devang Patel <dpatel@apple.com>
* config/rs6000/rs6000.md (insvsi_internal1): Subtract shift from
the mask end.
2005-05-18 Richard Henderson <rth@redhat.com>
* tree-ssa-forwprop.c (cfg_changed): New.

2
gcc/config/rs6000/rs6000.md
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@ -3014,7 +3014,7 @@
int size = INTVAL (operands[1]) & 31;
operands[4] = GEN_INT (shift - start - size);
operands[1] = GEN_INT (start + size - 1);
operands[1] = GEN_INT (start + size - 1 - shift);
return \"{rlimi|rlwimi} %0,%3,%h4,%h2,%h1\";
}"
[(set_attr "type" "insert_word")])

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2005-05-18 Devang Patel <dpatel@apple.com>
* g++.dg/opt/20050511-1.C: New test.
2005-05-18 Thomas Koenig <Thomas.Koenig@online.de>
PR libfortran/21127

64
gcc/testsuite/g++.dg/opt/20050511-1.C Normal file
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@ -0,0 +1,64 @@
/* { dg-do run } */
/* { dg-options "-O3" { target powerpc*-*-* } } */
#include <stdio.h>
#include <stdlib.h>
typedef signed short SINT16 ;
typedef unsigned long UINT32 ;
typedef unsigned int UINT ;
class A
{
public:
union
{
SINT16 xy[2];
UINT32 abXY;
};
bool operator==(const A& other) const {return abXY == other.abXY;}
bool operator!=(const A& other) const {return abXY != other.abXY;}
};
template <int size> struct pArray { unsigned char u08[16*(((size*1)+15)/16)] __attribute__ ((aligned(16))); };
struct B
{
union {
A mvL[2];
pArray<1> xyz;
};
} ;
typedef struct
{
UINT w;
B b;
}C;
UINT32 bar (const C * sPtr)
{
UINT w = sPtr->w;
A a;
a.xy[0] = sPtr->b.mvL[w].xy[0]<<2;
a.xy[1] = sPtr->b.mvL[w].xy[1]<<2;
if (a.xy[0] != ((SINT16) 0xffff << 2))
abort ();
}
int main()
{
A a;
C c;
a.xy[0] = 0xffff;
a.xy[1] = 0xffff;
c.w=0;
c.b.mvL[0].xy[0] = a.xy[0];
c.b.mvL[0].xy[1] = a.xy[1];
bar (&c);
}