OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

re PR middle-end/70920 (if ((intptr_t)ptr == 0) doesn't get simplified to if (ptr == 0))

Browse Source 
2016-07-26  Richard Biener  <rguenther@suse.de>
	    Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>

	PR middle-end/70920
	* match.pd ((intptr)x eq/ne CST to x eq/ne (typeof x) CST): New
	pattern.

testsuite/
	* gcc.dg/pr70920-1.c: New test-case.
	* gcc.dg/pr70902-2.c: Likewise.
	* gcc.dg/pr70920-3.c: Likewise.
	* gcc.dg/pr70920-4.c: Likewise
	* gcc.dg/tree-ssa/ssa-dom-branch-1.c: Change scan-tree-dump-times to
	2 instead of 3.

Co-Authored-By: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>

From-SVN: r238754
This commit is contained in:
Richard Biener 2016-07-26 13:10:33 +00:00 committed by Prathamesh Kulkarni
parent c4f820552a
commit 8f63caf682
8 changed files with 111 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2016-07-26 Richard Biener <rguenther@suse.de>
Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR middle-end/70920
* match.pd ((intptr)x eq/ne CST to x eq/ne (typeof x) CST): New
pattern.
2016-07-26 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
* tree-ssa-structalias.c (struct scc_info): Change types of

9
gcc/match.pd
View File

@ -2513,6 +2513,15 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
&& ptrs_compare_unequal (@0, @1))
{ neeq == EQ_EXPR ? boolean_false_node : boolean_true_node; })))
/* PR70920: Transform (intptr_t)x eq/ne CST to x eq/ne (typeof x) CST.
and (typeof ptr_cst) x eq/ne ptr_cst to x eq/ne (typeof x) CST */
(for cmp (ne eq)
(simplify
(cmp (convert @0) INTEGER_CST@1)
(if ((POINTER_TYPE_P (TREE_TYPE (@0)) && INTEGRAL_TYPE_P (TREE_TYPE (@1)))
|| (INTEGRAL_TYPE_P (TREE_TYPE (@0)) && POINTER_TYPE_P (TREE_TYPE (@1))))
(cmp @0 (convert @1)))))
/* Non-equality compare simplifications from fold_binary */
(for cmp (lt gt le ge)
/* Comparisons with the highest or lowest possible integer of

11
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,14 @@
2016-07-26 Richard Biener <rguenther@suse.de>
Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR middle-end/70920
* gcc.dg/pr70920-1.c: New test-case.
* gcc.dg/pr70902-2.c: Likewise.
* gcc.dg/pr70920-3.c: Likewise.
* gcc.dg/pr70920-4.c: Likewise
* gcc.dg/tree-ssa/ssa-dom-branch-1.c: Change scan-tree-dump-times to
2 instead of 3.
2016-07-25 Alexander Monakov <amonakov@ispras.ru>
* gcc.c-torture/execute/pr71494.c: Require label_values.

20
gcc/testsuite/gcc.dg/pr70920-1.c Normal file
View File

@ -0,0 +1,20 @@
/* { dg-do compile } */
/* { dg-options "-fdump-tree-gimple" } */
#include <stdint.h>
void f1();
void f2();
void
foo (int *a)
{
if ((intptr_t) a == 0)
{
f1 ();
if (a)
f2 ();
}
}
/* { dg-final { scan-tree-dump "if \\(a == 0B\\)" "gimple" } } */

21
gcc/testsuite/gcc.dg/pr70920-2.c Normal file
View File

@ -0,0 +1,21 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-forwprop-details" } */
#include <stdint.h>
void f1();
void f2();
void
foo (int *a)
{
int cst = 0;
if ((intptr_t) a == cst)
{
f1 ();
if (a)
f2 ();
}
}
/* { dg-final { scan-tree-dump "gimple_simplified to if \\(a_\[0-9\]*\\(D\\) == 0B\\)" "forwprop1" } } */

20
gcc/testsuite/gcc.dg/pr70920-3.c Normal file
View File

@ -0,0 +1,20 @@
/* { dg-do compile } */
/* { dg-options "-fdump-tree-gimple -Wno-int-to-pointer-cast" } */
#include <stdint.h>
void f1();
void f2();
void
foo (int a)
{
if ((int *) a == 0)
{
f1 ();
if (a)
f2 ();
}
}
/* { dg-final { scan-tree-dump "if \\(a == 0\\)" "gimple" } } */

21
gcc/testsuite/gcc.dg/pr70920-4.c Normal file
View File

@ -0,0 +1,21 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-ccp-details -Wno-int-to-pointer-cast" } */
#include <stdint.h>
void f1();
void f2();
void
foo (int a)
{
void *cst = 0;
if ((int *) a == cst)
{
f1 ();
if (a)
f2 ();
}
}
/* { dg-final { scan-tree-dump "gimple_simplified to if \\(_\[0-9\]* == 0\\)" "ccp1" } } */

4
gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-branch-1.c
View File

@ -19,9 +19,9 @@ try_combine (rtx i1, rtx newpat)
else if (i1 && foo ());
}
/* There should be three tests against i1. Two from the hash table
/* There should be two tests against i1. One from the hash table
dumps, one in the code itself. */
/* { dg-final { scan-tree-dump-times "if .i1_" 3 "dom2"} } */
/* { dg-final { scan-tree-dump-times "if .i1_" 2 "dom2"} } */
/* There should be no actual jump threads realized by DOM. The
legitimize jump threads are handled in VRP and those discovered