27 Commits

Author	SHA1	Message	Date
Matheus Aguiar	2282ea5e56	Added overflow checks after multiplication operation is executed.	2022-08-12 10:18:05 -03:00
Matheus Aguiar	4fd5c11af7	Checks for overflow/underflow after add/sub operations.	2022-06-23 14:41:12 -03:00
Daniel Kirchner	d1e382f2a8	Python Z3 proofs of the rules.	2022-06-22 09:26:09 +02:00
chriseth	4f02be110c	Unused store eliminator.	2022-03-10 18:25:28 +01:00
Kamil Śliwak	784ae91b41	pylint: Enable and fix no-self-use warnings	2021-12-21 15:30:11 +01:00
Kamil Śliwak	4ed86edbc4	test/formal: Get rid of wildcard imports	2021-10-13 16:20:10 +02:00
Kamil Śliwak	b96de320e2	Fix the simplest pylint warnings (variables/imports, semicolons, etc) and re-enable them in pylintrc	2021-10-13 16:19:16 +02:00
chriseth	c6473ff32b	Proof for rules.	2021-08-19 12:51:54 +02:00
hrkrshnn	59db0f1537	An equivalence check for SIGNEXTEND opcode ... Checking the implementation of SIGNEXTEND using Z3's native SignExt and Extract	2021-08-16 18:54:33 +02:00
chriseth	5906d25a39	Formalization of SIGNEXTEND and rule proofs	2021-08-16 18:54:33 +02:00
hrkrshnn	a54addc2cb	An equivalence check for the Byte opcode ... Checks that the byte opcode (implemented using shift) is equivalent to a canonical definition of byte using extract.	2021-08-10 11:00:29 +02:00
chriseth	f6789de9f8	Fix implementation of BYTE	2021-08-09 19:14:14 +02:00
chriseth	baf2ff2a6e	Proof.	2021-03-18 08:42:49 +01:00
chriseth	40c27ccc22	Move AND with constant inside OR.	2021-03-09 15:26:19 +01:00
chriseth	d46da8e53c	Optimize iszero(sub(x, y)) to eq(x, y).	2020-12-22 15:11:48 +01:00
Harikrishnan Mulackal	2b9f040c48	Optimize exp when base is -1	2020-09-29 17:44:09 +02:00
Harikrishnan Mulackal	64ddf2c699	Verify simplification rule exp(2, X) to shl(X, 1)	2020-09-16 17:36:39 +02:00
chriseth	a3a9630d8b	Optimize byte-after-shr for shift amounts that are not multiples of 8.	2020-08-04 12:16:23 +02:00
chriseth	59f4989966	Optimize combination of byte and shl.	2020-07-08 20:26:46 +02:00
yoni206	4327434d07	Adding bit-vector NOT operation to the opcodes.	2020-04-28 09:43:31 -07:00
Leonardo Alt	606153ba71	Add optimizer rules for repeated and	2020-04-22 10:20:59 +02:00
Daniel Kirchner	c71fb76bb2	Proofs for the overflow and underflow conditions in checked arithmetic for Sol->Yul code generation.	2019-06-20 15:58:10 +02:00
Leonardo Alt	51ba7f5f17	Add CI job for optimization proofs	2019-06-19 22:29:23 +02:00
chriseth	633510eb04	Merge pull request #6935 from ethereum/subMaxValueXNotXRule ... Add optimization rule SUB(~0, X) -> NOT(X).	2019-06-17 14:42:49 +02:00
Daniel Kirchner	5718072e10	Fix comparison opcodes and minor errors in proof scripts.	2019-06-14 17:04:50 +02:00
Daniel Kirchner	d3293cf0d0	Correctness proof for SUB(NOT(0),X)->NOT(X).	2019-06-14 14:08:21 +02:00
Leonardo Alt	5089d4ac28	Move optimization proofs repo to Solidity repo	2019-06-13 17:11:48 +02:00