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Implement signed multiplication for sol->yul code generation.

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This commit is contained in:
Daniel Kirchner
2019-06-20 12:30:30 +02:00
committed by chriseth
parent e4c884ae13
commit a5b9f634ef
5 changed files with 84 additions and 23 deletions
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test/libsolidity/semanticTests/viaYul/detect_mul_overflow.yul → test/libsolidity/semanticTests/viaYul/detect_mul_overflow.sol
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test/libsolidity/semanticTests/viaYul/detect_mul_overflow_signed.sol
+58
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@@ -0,0 +1,58 @@
contract C {
function f(int a, int b) public pure returns (int x) {
x = a * b;
}
function g(int8 a, int8 b) public pure returns (int8 x) {
x = a * b;
}
}
// ====
// compileViaYul: true
// ----
// f(int256,int256): 5, 6 -> 30
// f(int256,int256): -1, 1 -> -1
// f(int256,int256): -1, 2 -> -2
// # positive, positive #
// f(int256,int256): 0x3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, 2 -> 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE
// f(int256,int256): 0x4000000000000000000000000000000000000000000000000000000000000000, 2 -> FAILURE
// f(int256,int256): 2, 0x3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF -> 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE
// f(int256,int256): 2, 0x4000000000000000000000000000000000000000000000000000000000000000 -> FAILURE
// # positive, negative #
// f(int256,int256): 0x4000000000000000000000000000000000000000000000000000000000000000, -2 -> 0x8000000000000000000000000000000000000000000000000000000000000000
// f(int256,int256): 0x4000000000000000000000000000000000000000000000000000000000000001, -2 -> FAILURE
// f(int256,int256): 2, 0xC000000000000000000000000000000000000000000000000000000000000000 -> 0x8000000000000000000000000000000000000000000000000000000000000000
// f(int256,int256): 2, 0xBFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF -> FAILURE
// # negative, positive #
// f(int256,int256): -2, 0x4000000000000000000000000000000000000000000000000000000000000000 -> 0x8000000000000000000000000000000000000000000000000000000000000000
// f(int256,int256): -2, 0x4000000000000000000000000000000000000000000000000000000000000001 -> FAILURE
// f(int256,int256): 0xC000000000000000000000000000000000000000000000000000000000000000, 2 -> 0x8000000000000000000000000000000000000000000000000000000000000000
// f(int256,int256): 0xBFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, 2 -> FAILURE
// # negative, negative #
// f(int256,int256): 0xC000000000000000000000000000000000000000000000000000000000000001, -2 -> 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE
// f(int256,int256): 0xC000000000000000000000000000000000000000000000000000000000000000, -2 -> FAILURE
// f(int256,int256): -2, 0xC000000000000000000000000000000000000000000000000000000000000001 -> 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE
// f(int256,int256): -2, 0xC000000000000000000000000000000000000000000000000000000000000000 -> FAILURE
// # small type #
// g(int8,int8): 5, 6 -> 30
// g(int8,int8): -1, 1 -> -1
// g(int8,int8): -1, 2 -> -2
// # positive, positive #
// g(int8,int8): 63, 2 -> 126
// g(int8,int8): 64, 2 -> FAILURE
// g(int8,int8): 2, 63 -> 126
// g(int8,int8): 2, 64 -> FAILURE
// # positive, negative #
// g(int8,int8): 64, -2 -> -128
// g(int8,int8): 65, -2 -> FAILURE
// g(int8,int8): 2, -64 -> -128
// g(int8,int8): 2, -65 -> FAILURE
// # negative, positive #
// g(int8,int8): -2, 64 -> -128
// g(int8,int8): -2, 65 -> FAILURE
// g(int8,int8): -64, 2 -> -128
// g(int8,int8): -65, 2 -> FAILURE
// # negative, negative #
// g(int8,int8): -63, -2 -> 126
// g(int8,int8): -64, -2 -> FAILURE
// g(int8,int8): -2, -63 -> 126
// g(int8,int8): -2, -64 -> FAILURE