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Control flow side-effects for user-defined functions.

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chriseth
2021-10-14 17:46:07 +02:00
parent d443fe415d
commit 9417d6775f
20 changed files with 637 additions and 32 deletions
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libyul/backends/wasm/WasmDialect.cpp
+7 -6
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@@ -129,8 +129,9 @@ WasmDialect::WasmDialect()
m_functions["unreachable"_yulstring].sideEffects.storage = SideEffects::None;
m_functions["unreachable"_yulstring].sideEffects.memory = SideEffects::None;
m_functions["unreachable"_yulstring].sideEffects.otherState = SideEffects::None;
m_functions["unreachable"_yulstring].controlFlowSideEffects.terminates = true;
m_functions["unreachable"_yulstring].controlFlowSideEffects.reverts = true;
m_functions["unreachable"_yulstring].controlFlowSideEffects.canTerminate = false;
m_functions["unreachable"_yulstring].controlFlowSideEffects.canRevert = true;
m_functions["unreachable"_yulstring].controlFlowSideEffects.canContinue = false;
addFunction("datasize", {i64}, {i64}, true, {LiteralKind::String});
addFunction("dataoffset", {i64}, {i64}, true, {LiteralKind::String});
@@ -215,11 +216,11 @@ void WasmDialect::addExternals()
{"eth", "log", {i32ptr, i32, i32, i32ptr, i32ptr, i32ptr, i32ptr}, {}},
{"eth", "getBlockNumber", {}, {i64}},
{"eth", "getTxOrigin", {i32ptr}, {}},
{"eth", "finish", {i32ptr, i32}, {}, ControlFlowSideEffects{true, false}},
{"eth", "revert", {i32ptr, i32}, {}, ControlFlowSideEffects{true, true}},
{"eth", "finish", {i32ptr, i32}, {}, ControlFlowSideEffects{true, false, false}},
{"eth", "revert", {i32ptr, i32}, {}, ControlFlowSideEffects{false, true, false}},
{"eth", "getReturnDataSize", {}, {i32}},
{"eth", "returnDataCopy", {i32ptr, i32, i32}, {}},
{"eth", "selfDestruct", {i32ptr}, {}, ControlFlowSideEffects{true, false}},
{"eth", "selfDestruct", {i32ptr}, {}, ControlFlowSideEffects{false, true, false}},
{"eth", "getBlockTimestamp", {}, {i64}},
{"debug", "print32", {i32}, {}},
{"debug", "print64", {i64}, {}},
@@ -240,7 +241,7 @@ void WasmDialect::addExternals()
// TODO some of them are side effect free.
f.sideEffects = SideEffects::worst();
f.sideEffects.cannotLoop = true;
f.sideEffects.movableApartFromEffects = !ext.controlFlowSideEffects.terminates;
f.sideEffects.movableApartFromEffects = !ext.controlFlowSideEffects.terminatesOrReverts();
f.controlFlowSideEffects = ext.controlFlowSideEffects;
f.isMSize = false;
f.literalArguments.clear();