* [GSoC][match-and-simplify] Add abs_expr pattern
@ 2014-08-11 22:58 Prathamesh Kulkarni
2014-08-12 11:26 ` Richard Biener
0 siblings, 1 reply; 2+ messages in thread
From: Prathamesh Kulkarni @ 2014-08-11 22:58 UTC (permalink / raw)
To: Richard Biener, Maxim Kuvyrkov, gcc-patches
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Add pattern: abs (abs (x)) -> abs (x)
* match.pd: Add new pattern.
[gcc/testsuite/gcc.dg/tree-ssa]
* match.c: New test-case.
Thanks,
Prathamesh
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Index: gcc/match.pd
===================================================================
--- gcc/match.pd (revision 213814)
+++ gcc/match.pd (working copy)
@@ -101,6 +101,12 @@ along with GCC; see the file COPYING3.
(fma INTEGER_CST_P@0 INTEGER_CST_P@1 @3)
(plus (mult @0 @1) @3))
+/* abs (abs (x)) -> abs (x) */
+(simplify
+ (abs (abs @0))
+ (abs @0))
+
+
#include "match-plusminus.pd"
#include "match-bitwise.pd"
#include "match-rotate.pd"
Index: gcc/testsuite/gcc.dg/tree-ssa/match.c
===================================================================
--- gcc/testsuite/gcc.dg/tree-ssa/match.c (revision 0)
+++ gcc/testsuite/gcc.dg/tree-ssa/match.c (working copy)
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-forwprop1-details" } */
+
+int abs(int);
+
+int match_1 (int x)
+{
+ int t1 = abs (x);
+ int match_1_val = abs (t1);
+ return match_1_val;
+}
+/* { dg-final { scan-tree-dump "gimple_simplified to match_1_val_\\d\+ = ABS_EXPR <x_\\d\+\\(D\\)" "forwprop1" } } */
+
+/* { dg-final { cleanup-tree-dump "forwprop1" } } */
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [GSoC][match-and-simplify] Add abs_expr pattern
2014-08-11 22:58 [GSoC][match-and-simplify] Add abs_expr pattern Prathamesh Kulkarni
@ 2014-08-12 11:26 ` Richard Biener
0 siblings, 0 replies; 2+ messages in thread
From: Richard Biener @ 2014-08-12 11:26 UTC (permalink / raw)
To: Prathamesh Kulkarni; +Cc: Maxim Kuvyrkov, gcc-patches
On Tue, Aug 12, 2014 at 12:58 AM, Prathamesh Kulkarni
<bilbotheelffriend@gmail.com> wrote:
> Add pattern: abs (abs (x)) -> abs (x)
>
> * match.pd: Add new pattern.
Thanks - applied.
Richard.
> [gcc/testsuite/gcc.dg/tree-ssa]
> * match.c: New test-case.
>
> Thanks,
> Prathamesh
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