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xermicusandLJ
68e8b167f5
- Remove the buggy `fn find_value_uses()` - The logic flips from default-skip to default-keep Closes #588 --------- Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com> Co-authored-by: LJ <81748770+elle-j@users.noreply.github.com>
21 lines
1004 B
Plaintext
21 lines
1004 B
Plaintext
object "SwitchCvYieldOnly" {
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code { let s := datasize("SwitchCvYieldOnly_deployed") codecopy(0, dataoffset("SwitchCvYieldOnly_deployed"), s) return(0, s) }
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object "SwitchCvYieldOnly_deployed" {
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code {
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let sel := calldataload(0)
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// Three callvalue() sites put the module over the outlined-callvalue threshold, so
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// codegen runs the dead-callvalue analysis. Case 1 binds callvalue() and its only use
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// is the region yield carrying the switch result into `r`. The other branches evaluate
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// their second operand first, so no branch-leading callvalue hoist merges the bindings
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// and the yield-only binding survives to codegen. The analysis must count region yields
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// as uses, otherwise the binding is skipped and the yield references an undefined value.
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let r := 0
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switch sel
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case 1 { r := callvalue() }
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case 2 { r := add(callvalue(), calldatasize()) }
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default { r := add(callvalue(), 0x20) }
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sstore(0, r)
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}
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}
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}
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