First pass at emitIAS for branches and binding labels
Currently not testing fixups of forward branches and
instead streaming a ".byte (foo - (. + 1))" or
".long (foo - (. + 4))". It should be supported once
emitIAS() delays writing things out until after the
function is fully emitted (and therefore forward labels
have all been bound).
BUG=none
R=stichnot@chromium.org
Review URL: https://codereview.chromium.org/673543002
diff --git a/src/assembler_ia32.cpp b/src/assembler_ia32.cpp
index 2b80820..11ff859 100644
--- a/src/assembler_ia32.cpp
+++ b/src/assembler_ia32.cpp
@@ -67,6 +67,53 @@
return x86::Address::Absolute(Fixup);
}
+AssemblerX86::~AssemblerX86() {
+#ifndef NDEBUG
+ for (const Label *Label : CfgNodeLabels) {
+ Label->FinalCheck();
+ }
+ for (const Label *Label : LocalLabels) {
+ Label->FinalCheck();
+ }
+#endif
+}
+
+Label *AssemblerX86::GetOrCreateLabel(SizeT Number, LabelVector &Labels) {
+ Label *L = nullptr;
+ if (Number == Labels.size()) {
+ L = new (this->Allocate<Label>()) Label();
+ Labels.push_back(L);
+ return L;
+ }
+ if (Number > Labels.size()) {
+ Labels.resize(Number + 1);
+ }
+ L = Labels[Number];
+ if (!L) {
+ L = new (this->Allocate<Label>()) Label();
+ Labels[Number] = L;
+ }
+ return L;
+}
+
+Label *AssemblerX86::GetOrCreateCfgNodeLabel(SizeT NodeNumber) {
+ return GetOrCreateLabel(NodeNumber, CfgNodeLabels);
+}
+
+Label *AssemblerX86::GetOrCreateLocalLabel(SizeT Number) {
+ return GetOrCreateLabel(Number, LocalLabels);
+}
+
+void AssemblerX86::BindCfgNodeLabel(SizeT NodeNumber) {
+ Label *L = GetOrCreateCfgNodeLabel(NodeNumber);
+ this->Bind(L);
+}
+
+void AssemblerX86::BindLocalLabel(SizeT Number) {
+ Label *L = GetOrCreateLocalLabel(Number);
+ this->Bind(L);
+}
+
void AssemblerX86::call(GPRRegister reg) {
AssemblerBuffer::EnsureCapacity ensured(&buffer_);
EmitUint8(0xFF);
