Marc,
Ah I did misunderstand you. Patch with match.pd formatting fix.
On 10/01/2015 01:05 AM, Marc Glisse wrote:
On Thu, 1 Oct 2015, Michael Collison wrote:
ChangeLog formatting and test case fixed.
Oups, sorry for the lack of precision, but I meant indenting the code
in match.pd, I hadn't even looked at the ChangeLog.
--
Michael Collison
Linaro Toolchain Working Group
michael.colli...@linaro.org
2015-09-30 Michael Collison <michael.colli...@linaro.org>
Andrew Pinski <andrew.pin...@caviumnetworks.com>
* match.pd ((x < y) && (x < z) -> x < min (y,z),
(x > y) and (x > z) -> x > max (y,z))
* testsuite/gcc.dg/tree-ssa/minmax-loopend.c: New test.
diff --git a/gcc/match.pd b/gcc/match.pd
index bd5c267..caf3c82 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -2311,3 +2311,13 @@ along with GCC; see the file COPYING3. If not see
(with { tree utype = unsigned_type_for (TREE_TYPE (@0)); }
(convert (bit_and (op (convert:utype @0) (convert:utype @1))
(convert:utype @4))))))))
+
+/* Transform (@0 < @1 and @0 < @2) to use min,
+ (@0 > @1 and @0 > @2) to use max */
+(for op (lt le gt ge)
+ ext (min min max max)
+ (simplify
+ (bit_and (op:s @0 @1) (op:s @0 @2))
+ (if (INTEGRAL_TYPE_P (TREE_TYPE (@0)))
+ (op @0 (ext @1 @2)))))
+
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/minmax-loopend.c b/gcc/testsuite/gcc.dg/tree-ssa/minmax-loopend.c
new file mode 100644
index 0000000..2e4300c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/minmax-loopend.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+int min_test(long a, long b, long c) {
+ int cmp1 = a < b;
+ int cmp2 = a < c;
+ return cmp1 & cmp2;
+}
+
+int max_test (long a, long b, long c) {
+ int cmp1 = a > b;
+ int cmp2 = a > c;
+ return cmp1 & cmp2;
+}
+
+/* { dg-final { scan-tree-dump-times "MIN_EXPR" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "MAX_EXPR" 1 "optimized" } } */
--
1.9.1
