From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To: linux-sparse@vger.kernel.org
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Subject: [PATCH 04/22] unop: add helper eval_unop()
Date: Tue, 20 Oct 2020 23:10:03 +0200 [thread overview]
Message-ID: <20201020211021.82394-5-luc.vanoostenryck@gmail.com> (raw)
In-Reply-To: <20201020211021.82394-1-luc.vanoostenryck@gmail.com>
Currently, eval_op() only do the evaluation of binops but unops
need sometimes to be evaluated too.
So, teach eval_op() about OP_NEG & OP_NOT and add a new helper,
eval_unop() for making it easier to use with unops.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
simplify.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/simplify.c b/simplify.c
index ac27debfcefb..4c6569eba036 100644
--- a/simplify.c
+++ b/simplify.c
@@ -535,6 +535,13 @@ static pseudo_t eval_op(int op, unsigned size, pseudo_t src1, pseudo_t src2)
ur = right & bits;
switch (op) {
+ case OP_NEG:
+ res = -left;
+ break;
+ case OP_NOT:
+ res = ~ul;
+ break;
+
case OP_ADD:
res = left + right;
break;
@@ -636,6 +643,11 @@ undef:
return NULL;
}
+static inline pseudo_t eval_unop(int op, unsigned size, pseudo_t src)
+{
+ return eval_op(op, size, src, VOID);
+}
+
///
// Simplifications
// ^^^^^^^^^^^^^^^
--
2.28.0
next prev parent reply other threads:[~2020-10-20 21:10 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-20 21:09 [PATCH 00/22] essential OP_ADD & OP_SUB simplifications Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 01/22] add testcases about " Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 02/22] let switch_pseudo() return REPEAT_CSE Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 03/22] extract eval_op() from eval_insn() Luc Van Oostenryck
2020-10-20 21:10 ` Luc Van Oostenryck [this message]
2020-10-20 21:10 ` [PATCH 05/22] unop: add helper replace_with_unop() Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 06/22] add a flag to identify commutative & associative ops Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 07/22] constants must be truncated to the operation's size Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 08/22] reassoc: simplify (x # C) # K --> x # eval(C # K) Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 09/22] sub: reorganize handling of OP_{ADD,SUB}s with constant rightside Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 10/22] sub: canonicalize (0 - x) into -x Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 11/22] sub: simplify C - (y + D) --> eval(C-D) - y Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 12/22] sub: simplify C - (D - z) --> z + eval(C-D) Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 13/22] sub: simplify (C - y) + D --> eval(C+D) - y Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 14/22] sub: simplify (x - -y) --> (x + y) Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 15/22] add: simplify (x + -y) --> (x - y) Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 16/22] add: simplify (-x + y) --> (y - x) Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 17/22] sub: simplify (x + y) - x --> y Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 18/22] sub: simplify (x + y) - y --> x Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 19/22] sub: simplify x - (x + y) --> -y Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 20/22] sub: simplify x - (y + x) " Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 21/22] sub: simplify (x - y) + y --> x Luc Van Oostenryck
2020-10-20 21:10 ` [PATCH 22/22] sub: simplify x + (y - x) --> y Luc Van Oostenryck
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