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Add support for a temporary local variable to reused values on the

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This commit is contained in:
Volker Berlin 2018-05-11 22:05:20 +02:00
parent 5ea2eff713
commit 61c7f8edf4
1 changed files with 22 additions and 0 deletions
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22
src/de/inetsoftware/jwebassembly/module/LocaleVariableManager.java
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@ -36,6 +36,8 @@ class LocaleVariableManager {
private int size; private int size;
private boolean needTempI32;
private ArrayList<ValueType> localTypes = new ArrayList<>(); private ArrayList<ValueType> localTypes = new ArrayList<>();
/** /**
@ -59,6 +61,7 @@ class LocaleVariableManager {
var.idx = -1; var.idx = -1;
} }
size = 0; size = 0;
needTempI32 = false;
} }
/** /**
@ -80,10 +83,20 @@ class LocaleVariableManager {
var.valueType = valueType; var.valueType = valueType;
} }
/**
* We need an extra temporary variable inn the WebAssembly code.
*/
void useTempI32() {
needTempI32 = true;
}
/** /**
* Calculate the WebAssembly index position on the consumed data. * Calculate the WebAssembly index position on the consumed data.
*/ */
void calculate() { void calculate() {
if( needTempI32 ) {
use( ValueType.i32, size );
}
int idx = 0; int idx = 0;
for( int i = 0; i < size; i++ ) { for( int i = 0; i < size; i++ ) {
LocaleVariable var = variables[i]; LocaleVariable var = variables[i];
@ -112,6 +125,15 @@ class LocaleVariableManager {
return localTypes; return localTypes;
} }
/**
* Get the slot of the temporary variable.
*
* @return the slot
*/
int getTempI32() {
return size - 1;
}
/** /**
* Get the WebAssembly variable index of the given Java Slot. * Get the WebAssembly variable index of the given Java Slot.
* *