diff --git a/gcc/match.pd b/gcc/match.pd index bd5c267..ef2e025 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..dfe6120 --- /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 "MIN_EXPR" 1 "optimized" } } */ +/* { dg-final { scan-tree-dump "MAX_EXPR" 1 "optimized" } } */ -- 1.9.1