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2017-11-27  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR middle_end/82333
	* varasm.c (compare_constant): Take the mode of the constants into
	account when comparing floating point constants.

[gcc/testsuite]
2017-11-27  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR middle_end/82333
	* gcc.target/powerpc/pr82333.c: New test.

From-SVN: r255177
This commit is contained in:
Michael Meissner 2017-11-27 19:45:56 +00:00 committed by Michael Meissner
parent 0f42ffd7f7
commit 32c95bcae3
4 changed files with 53 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-11-27 Michael Meissner <meissner@linux.vnet.ibm.com>
PR middle_end/82333
* varasm.c (compare_constant): Take the mode of the constants into
account when comparing floating point constants.
2017-11-27 Gerald Pfeifer <gerald@pfeifer.com>
* hash-set.h (DEFINE_DEBUG_HASH_SET): Remove static qualifier

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-11-27 Michael Meissner <meissner@linux.vnet.ibm.com>
PR middle_end/82333
* gcc.target/powerpc/pr82333.c: New test.
2017-11-27 Jakub Jelinek <jakub@redhat.com>
PR c++/81675

34
gcc/testsuite/gcc.target/powerpc/pr82333.c Normal file
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@ -0,0 +1,34 @@
/* { dg-do compile { target { powerpc*-*-linux* } } } */
/* { dg-require-effective-target ppc_float128_sw } */
/* { dg-require-effective-target vsx_hw } */
/* { dg-options "-mvsx -O2 -mabi=ibmlongdouble -Wno-psabi" } */
/* PR 82333 was an internal compiler abort where the compiler thought that a
long double _Complex constant was the same as __float128 _Complex. */
_Complex long double vld;
_Complex _Float128 vf128;
_Complex long double
fld (_Complex long double arg0)
{
return 0;
}
_Complex _Float128
ff128 (_Complex _Float128 arg0)
{
return 0;
}
void
tld (void)
{
vld = fld (vld);
}
void
tf128 (void)
{
vf128 = ff128 (vf128);
}

10
gcc/varasm.c
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@ -3118,10 +3118,16 @@ compare_constant (const tree t1, const tree t2)
return tree_int_cst_equal (t1, t2);
case REAL_CST:
/* Real constants are the same only if the same width of type. */
/* Real constants are the same only if the same width of type. In
addition to the same width, we need to check whether the modes are the
same. There might be two floating point modes that are the same size
but have different representations, such as the PowerPC that has 2
different 128-bit floating point types (IBM extended double and IEEE
128-bit floating point). */
if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2)))
return 0;
if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2)))
return 0;
return real_identical (&TREE_REAL_CST (t1), &TREE_REAL_CST (t2));
case FIXED_CST: