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Implement signed addition for sol->yul code generation.

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Daniel Kirchner
2019-06-20 11:42:50 +02:00
committed by chriseth
parent 5b92640ab5
commit 88988af561
5 changed files with 75 additions and 24 deletions
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test/libsolidity/semanticTests/viaYul/detect_add_overflow.yul → test/libsolidity/semanticTests/viaYul/detect_add_overflow.sol
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test/libsolidity/semanticTests/viaYul/detect_add_overflow_signed.sol
+37
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@@ -0,0 +1,37 @@
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 -> 11
// f(int256,int256): -2, 1 -> -1
// f(int256,int256): -2, 2 -> 0
// f(int256,int256): 2, -2 -> 0
// f(int256,int256): -5, -6 -> -11
// f(int256,int256): 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0, 0x0F -> 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
// f(int256,int256): 0x0F, 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0 -> 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
// f(int256,int256): 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF, 1 -> FAILURE
// f(int256,int256): 1, 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF -> FAILURE
// f(int256,int256): 0x8000000000000000000000000000000000000000000000000000000000000001, -1 -> 0x8000000000000000000000000000000000000000000000000000000000000000
// f(int256,int256): -1, 0x8000000000000000000000000000000000000000000000000000000000000001 -> 0x8000000000000000000000000000000000000000000000000000000000000000
// f(int256,int256): 0x8000000000000000000000000000000000000000000000000000000000000000, -1 -> FAILURE
// f(int256,int256): -1, 0x8000000000000000000000000000000000000000000000000000000000000000 -> FAILURE
// g(int8,int8): 5, 6 -> 11
// g(int8,int8): -2, 1 -> -1
// g(int8,int8): -2, 2 -> 0
// g(int8,int8): 2, -2 -> 0
// g(int8,int8): -5, -6 -> -11
// g(int8,int8): 126, 1 -> 127
// g(int8,int8): 1, 126 -> 127
// g(int8,int8): 127, 1 -> FAILURE
// g(int8,int8): 1, 127 -> FAILURE
// g(int8,int8): -127, -1 -> -128
// g(int8,int8): -1, -127 -> -128
// g(int8,int8): -127, -2 -> FAILURE
// g(int8,int8): -2, -127 -> FAILURE