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re PR middle-end/91866 (Sign extend of an int is not recognized)

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PR middle-end/91866
	* match.pd (((T)(A)) + CST -> (T)(A + CST)): Formatting fix.
	(((T)(A + CST1)) + CST2 -> (T)(A) + (T)CST1 + CST2): New optimization.

	* gcc.dg/tree-ssa/pr91866.c: New test.

From-SVN: r276096
This commit is contained in:
Jakub Jelinek 2019-09-24 14:45:13 +02:00 committed by Jakub Jelinek
parent 90acd49f6b
commit 81b405828f
4 changed files with 40 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2019-09-24 Jakub Jelinek <jakub@redhat.com>
PR middle-end/91866
* match.pd (((T)(A)) + CST -> (T)(A + CST)): Formatting fix.
(((T)(A + CST1)) + CST2 -> (T)(A) + (T)CST1 + CST2): New optimization.
2019-09-24 Martin Liska <mliska@suse.cz>
* cfgexpand.c (gimple_assign_rhs_to_tree): Use switch statement

19
gcc/match.pd
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@ -2265,8 +2265,9 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
max_ovf = wi::OVF_OVERFLOW;
tree inner_type = TREE_TYPE (@0);
wide_int w1 = wide_int::from (wi::to_wide (@1), TYPE_PRECISION (inner_type),
TYPE_SIGN (inner_type));
wide_int w1
= wide_int::from (wi::to_wide (@1), TYPE_PRECISION (inner_type),
TYPE_SIGN (inner_type));
wide_int wmin0, wmax0;
if (get_range_info (@0, &wmin0, &wmax0) == VR_RANGE)
@ -2280,6 +2281,20 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
)))
#endif
/* ((T)(A + CST1)) + CST2 -> (T)(A) + (T)CST1 + CST2 */
#if GIMPLE
(for op (plus minus)
(simplify
(plus (convert:s (op:s @0 INTEGER_CST@1)) INTEGER_CST@2)
(if (TREE_CODE (TREE_TYPE (@0)) == INTEGER_TYPE
&& TREE_CODE (type) == INTEGER_TYPE
&& TYPE_PRECISION (type) > TYPE_PRECISION (TREE_TYPE (@0))
&& TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@0))
&& !TYPE_OVERFLOW_SANITIZED (TREE_TYPE (@0))
&& TYPE_OVERFLOW_WRAPS (type))
(plus (convert @0) (op @2 (convert @1))))))
#endif
/* ~A + A -> -1 */
(simplify
(plus:c (bit_not @0) @0)

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2019-09-24 Jakub Jelinek <jakub@redhat.com>
PR middle-end/91866
* gcc.dg/tree-ssa/pr91866.c: New test.
2019-09-24 Martin Jambor <mjambor@suse.cz>
PR ipa/91831

12
gcc/testsuite/gcc.dg/tree-ssa/pr91866.c Normal file
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@ -0,0 +1,12 @@
/* PR middle-end/91866 */
/* { dg-do compile { target { ilp32 || lp64 } } } */
/* { dg-options "-O2 -fdump-tree-optimized" } * /
/* { dg-final { scan-tree-dump-times " \\+ 11;" 3 "optimized" } } */
/* { dg-final { scan-tree-dump-times " \[+-] \[0-9-]\[0-9]*;" 3 "optimized" } } */
/* { dg-final { scan-tree-dump-times "\\(long long unsigned int\\) x_" 5 "optimized" } } */
unsigned long long f1 (int x) { return (x + 1) - 1ULL; }
unsigned long long f2 (int x) { return (x - 5) + 5ULL; }
unsigned long long f3 (int x) { return (x - 15) + 26ULL; }
unsigned long long f4 (int x) { return (x + 6) + 5ULL; }
unsigned long long f5 (int x) { return (x - (-1 - __INT_MAX__)) + 10ULL - __INT_MAX__; }