[PATCH 2/2] Fix 101805: Simplify min/max of boolean arguments

[<apinski@marvell.com>]

From: Andrew Pinski <apinski@marvell.com>

I noticed this while Richard B. fixing PR101756.
Basically min of two bools is the same as doing an "and"
and max of two bools is doing an "ior".

gcc/ChangeLog:

	* match.pd: Add min/max patterns for bool types.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/bool-12.c: New test.
---
 gcc/match.pd                            | 10 +++++++++
 gcc/testsuite/gcc.dg/tree-ssa/bool-12.c | 27 +++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/bool-12.c

diff --git a/gcc/match.pd b/gcc/match.pd
index b1f2aaaac02..8fd60d08cfe 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -3103,6 +3103,16 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
        && (GIMPLE || !TREE_SIDE_EFFECTS (@1)))
    (cond (cmp @2 @3) @1 @0))))
 
+/* max(bool0, bool1) -> bool0 | bool1 */
+(simplify
+ (max gimple_truth_valued_p@0 gimple_truth_valued_p@1)
+ (bit_ior @0 @1))
+
+/* min(bool0, bool1) -> bool0 & bool1 */
+(simplify
+ (min gimple_truth_valued_p@0 gimple_truth_valued_p@1)
+ (bit_and @0 @1))
+
 /* Simplifications of shift and rotates.  */
 
 (for rotate (lrotate rrotate)
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/bool-12.c b/gcc/testsuite/gcc.dg/tree-ssa/bool-12.c
new file mode 100644
index 00000000000..2d8ad9912d3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/bool-12.c
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -fdump-tree-optimized -fdump-tree-original" } */
+#define bool _Bool
+int maxbool(bool ab, bool bb)
+{
+  int a = ab;
+  int b = bb;
+  int c;
+  c = (a > b)?a : b;
+  return c;
+}
+int minbool(bool ab, bool bb)
+{
+  int a = ab;
+  int b = bb;
+  int c;
+  c = (a < b)?a : b;
+  return c;
+}
+/* Original should have one of each MAX/MIN expressions. */
+/* { dg-final { scan-tree-dump-times "MAX_EXPR" 1 "original" } */
+/* { dg-final { scan-tree-dump-times "MIN_EXPR" 1 "original"} } */
+
+/* By the time we reach optimized, the MAX and MIN expressions
+   should have been removed. */
+/* { dg-final { scan-tree-dump-times "MAX_EXPR" 0 "optimized"} } */
+/* { dg-final { scan-tree-dump-times "MIN_EXPR" 0 "optimized"} } */
-- 
2.27.0