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* bugc: compile `!` as a logical not * bugc: link the changelog entry to #353 * bugc: end each source range at its last token * bugc: link the changelog entry to #362 * bugc: add block.prevrandao * bugc: link the changelog entries to #363 * bugc: hash several value-type words with keccak256 * bugc: link the changelog entries to #365 * bugc: slice a fixed-size bytes value by its bytes * bugc: link the changelog entry to #357 * bugc: hash the data of dynamic bytes and strings * bugc: link the changelog entry to #360 * bugc: give a caller's call JUMP the invoke's arguments * bugc: list variables before a function's first statement * bugc: store a memory string's bytes when assigning it to storage A storage write took its value as a word, so a memory string or bytes reference wrote its memory address into the slot. Code generation now encodes the referenced bytes as Solidity does: inline with length * 2 up to 31 bytes, else length * 2 + 1 in the slot and the data from keccak256(slot), with the last word's trailing bytes cleared. A slice now carries the bytes type, so its value is recognized too. * bugc: link the changelog entry to #355 * bugc: say why the bytes test slices without naming the copy width * bugc: copy all of a slice's bytes irgen built a slice's data as a read and a write, and a read or write moves at most one word, so only the first 32 bytes were copied. Add a copy IR instruction (CALLDATACOPY from calldata, MCOPY from memory) and emit it for the slice's data. * bugc: link the changelog entries to #359 * bugc: copy a struct read from storage into memory * bugc: link the changelog entries to #361 * bugc: lay storage arrays out as Solidity does * bugc: add push to dynamic arrays in storage
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The
hashinstruction always stored its operand at memory 0 and hashed that one word. That is right for abytesNvalue, but dynamicbytesandstringvalues are the memory address of a length word followed by the data, sokeccak256hashed the address.msg.datais 0 as a value, sokeccak256(msg.data)hashed the zero word.This hid at optimization levels 1 to 3 for a constant string, because constant folding hashes the string's bytes itself. So
keccak256("setMotd(string)")was0x5fe59b9d…at level 1 and up, and something else at level 0. A slice, a string local that the optimizer cannot fold, ormsg.datawas wrong at every level.Code generation now looks at the operand:
mload(p)bytes fromp + 32.msg.data(found the same way as forlength, by the temps anenv msg_datadefines) copies the calldata to the free memory, without allocating it, and hashes it there.The new behavioral tests hash string literals (empty, one word, longer than a word), a string local, a calldata slice, and
msg.data, at each optimization level.