diff options
| author | Simon Hausmann <simon.hausmann@qt.io> | 2018-08-21 16:51:17 +0200 |
|---|---|---|
| committer | Simon Hausmann <simon.hausmann@qt.io> | 2018-08-28 17:50:41 +0000 |
| commit | bead103138c0d9dff3c9f927c9c4e2f44ee7db4c (patch) | |
| tree | 32b23e94d07b5169758b426b1ad614e240dae9cd /src/qml/compiler/qv4instr_moth_p.h | |
| parent | ec6996bcbed583177952f81f5bfaf1d67eb573ad (diff) | |
Implement the dead temporal zone
With const and let it is possible to access the declared member before
initialization. This is expected to throw a type reference error at
run-time.
We initialize such variables with the empty value when entering their
scope and check upon access for that. For locals we place the lexically
scoped variables at the end. For register allocated lexical variables we
group them into one batch and remember the index/size.
Change-Id: Icb493ee0de0525bb682e1bc58981a4dfd33f750e
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Diffstat (limited to 'src/qml/compiler/qv4instr_moth_p.h')
| -rw-r--r-- | src/qml/compiler/qv4instr_moth_p.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/qml/compiler/qv4instr_moth_p.h b/src/qml/compiler/qv4instr_moth_p.h index 25a07208c2..7c2cbf717e 100644 --- a/src/qml/compiler/qv4instr_moth_p.h +++ b/src/qml/compiler/qv4instr_moth_p.h @@ -118,6 +118,7 @@ QT_BEGIN_NAMESPACE #define INSTR_SetUnwindHandler(op) INSTRUCTION(op, SetUnwindHandler, 1, offset) #define INSTR_UnwindDispatch(op) INSTRUCTION(op, UnwindDispatch, 0) #define INSTR_UnwindToLabel(op) INSTRUCTION(op, UnwindToLabel, 2, level, offset) +#define INSTR_DeadTemporalZoneCheck(op) INSTRUCTION(op, DeadTemporalZoneCheck, 1, name) #define INSTR_ThrowException(op) INSTRUCTION(op, ThrowException, 0) #define INSTR_GetException(op) INSTRUCTION(op, GetException, 0) #define INSTR_SetException(op) INSTRUCTION(op, SetException, 0) @@ -192,6 +193,7 @@ QT_BEGIN_NAMESPACE #define INSTR_Sub(op) INSTRUCTION(op, Sub, 1, lhs) #define INSTR_LoadQmlContext(op) INSTRUCTION(op, LoadQmlContext, 1, result) #define INSTR_LoadQmlImportedScripts(op) INSTRUCTION(op, LoadQmlImportedScripts, 1, result) +#define INSTR_InitializeBlockDeadTemporalZone(op) INSTRUCTION(op, InitializeBlockDeadTemporalZone, 2, firstReg, count) #define FOR_EACH_MOTH_INSTR_ALL(F) \ F(Nop) \ @@ -295,6 +297,7 @@ QT_BEGIN_NAMESPACE F(SetUnwindHandler) \ F(UnwindDispatch) \ F(UnwindToLabel) \ + F(DeadTemporalZoneCheck) \ F(ThrowException) \ F(GetException) \ F(SetException) \ @@ -326,6 +329,7 @@ QT_BEGIN_NAMESPACE F(LoadSuperConstructor) \ F(PushScriptContext) \ F(PopScriptContext) \ + F(InitializeBlockDeadTemporalZone) \ F(Debug) \ #define MOTH_NUM_INSTRUCTIONS() (static_cast<int>(Moth::Instr::Type::Debug_Wide) + 1) |