Prevent crash when translating yul->ewasm with @use-src annotations

Author: Marenz

Changelog.md

@@ -7,6 +7,7 @@ Compiler Features:
 
 
 Bugfixes:
+ * Code Generator: Fix a crash when using ``@use-src`` and compiling from Yul to ewasm
 
 
 ### 0.8.10 (2021-11-09)

libyul/backends/wasm/EVMToEwasmTranslator.cpp

@@ -137,7 +137,7 @@ void EVMToEwasmTranslator::parsePolyfill()
 			string(solidity::yul::wasm::polyfill::Logical) +
 			string(solidity::yul::wasm::polyfill::Memory) +
 		"}", "");
-	m_polyfill = Parser(errorReporter, WasmDialect::instance()).parse(charStream);
+	m_polyfill = Parser(errorReporter, WasmDialect::instance(), langutil::SourceLocation()).parse(charStream);
 	if (!errors.empty())
 	{
 		string message;

test/cmdlineTests/yul_to_wasm_source_location_crash/args

@@ -0,0 +1 @@
+--strict-assembly --yul-dialect evm --machine ewasm --optimize

test/cmdlineTests/yul_to_wasm_source_location_crash/err

@@ -0,0 +1 @@
+Warning: Yul is still experimental. Please use the output with care.

test/cmdlineTests/yul_to_wasm_source_location_crash/input.yul

@@ -0,0 +1,4 @@
+/// @use-src 0:"test.sol"
+object "C" {
+    code { sstore(0,0) }
+}

test/cmdlineTests/yul_to_wasm_source_location_crash/output

@@ -0,0 +1,95 @@
+
+======= yul_to_wasm_source_location_crash/input.yul (Ewasm) =======
+
+Pretty printed source:
+/// @use-src 0:"test.sol"
+object "C" {
+    code { { sstore(0, 0) } }
+}
+
+
+==========================
+
+Translated source:
+/// @use-src 0:"test.sol"
+object "C" {
+    code {
+        function main()
+        {
+            let hi := i64.shl(i64.extend_i32_u(bswap32(i32.wrap_i64(0))), 32)
+            let y := i64.or(hi, i64.extend_i32_u(bswap32(i32.wrap_i64(i64.shr_u(0, 32)))))
+            i64.store(0:i32, y)
+            i64.store(i32.add(0:i32, 8:i32), y)
+            i64.store(i32.add(0:i32, 16:i32), y)
+            i64.store(i32.add(0:i32, 24:i32), y)
+            i64.store(32:i32, y)
+            i64.store(i32.add(32:i32, 8:i32), y)
+            i64.store(i32.add(32:i32, 16:i32), y)
+            i64.store(i32.add(32:i32, 24:i32), y)
+            eth.storageStore(0:i32, 32:i32)
+        }
+        function bswap16(x:i32) -> y:i32
+        {
+            y := i32.or(i32.and(i32.shl(x, 8:i32), 0xff00:i32), i32.and(i32.shr_u(x, 8:i32), 0xff:i32))
+        }
+        function bswap32(x:i32) -> y:i32
+        {
+            let hi:i32 := i32.shl(bswap16(x), 16:i32)
+            y := i32.or(hi, bswap16(i32.shr_u(x, 16:i32)))
+        }
+    }
+}
+
+
+Binary representation:
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
+
+Text representation:
+(module
+    (import "ethereum" "storageStore" (func $eth.storageStore (param i32 i32)))
+    (memory $memory (export "memory") 1)
+    (export "main" (func $main))
+
+(func $main
+    (local $hi i64)
+    (local $y i64)
+    (block $label_
+        (local.set $hi (i64.shl (i64.extend_i32_u (call $bswap32 (i32.wrap_i64 (i64.const 0)))) (i64.const 32)))
+        (local.set $y (i64.or (local.get $hi) (i64.extend_i32_u (call $bswap32 (i32.wrap_i64 (i64.shr_u (i64.const 0) (i64.const 32)))))))
+        (i64.store (i32.const 0) (local.get $y))
+        (i64.store (i32.add (i32.const 0) (i32.const 8)) (local.get $y))
+        (i64.store (i32.add (i32.const 0) (i32.const 16)) (local.get $y))
+        (i64.store (i32.add (i32.const 0) (i32.const 24)) (local.get $y))
+        (i64.store (i32.const 32) (local.get $y))
+        (i64.store (i32.add (i32.const 32) (i32.const 8)) (local.get $y))
+        (i64.store (i32.add (i32.const 32) (i32.const 16)) (local.get $y))
+        (i64.store (i32.add (i32.const 32) (i32.const 24)) (local.get $y))
+        (call $eth.storageStore (i32.const 0) (i32.const 32))
+    )
+)
+
+(func $bswap16
+    (param $x i32)
+    (result i32)
+    (local $y i32)
+    (block $label__1
+        (local.set $y (i32.or (i32.and (i32.shl (local.get $x) (i32.const 8)) (i32.const 65280)) (i32.and (i32.shr_u (local.get $x) (i32.const 8)) (i32.const 255))))
+
+    )
+    (local.get $y)
+)
+
+(func $bswap32
+    (param $x i32)
+    (result i32)
+    (local $y i32)
+    (local $hi i32)
+    (block $label__2
+        (local.set $hi (i32.shl (call $bswap16 (local.get $x)) (i32.const 16)))
+        (local.set $y (i32.or (local.get $hi) (call $bswap16 (i32.shr_u (local.get $x) (i32.const 16)))))
+
+    )
+    (local.get $y)
+)
+
+)