Avoid generation of dead code in a few more situations.
- Emit variable declarations as "simple", we want to avoid forcing the creation
of a dummy basic block, but still need to make the variable available for
later use.
- With that, we can now skip IRgen for other unreachable statements (which
don't define a label).
- Anders, I added two fixmes on calls to EmitVLASize, can you check them?
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76361 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index ffea502..f2de3f6 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -147,7 +147,11 @@
~CleanupScope() {
CGF.PushCleanupBlock(CleanupBB);
- CGF.Builder.SetInsertPoint(CurBB);
+ // FIXME: This is silly, move this into the builder.
+ if (CurBB)
+ CGF.Builder.SetInsertPoint(CurBB);
+ else
+ CGF.Builder.ClearInsertionPoint();
}
};
@@ -510,6 +514,8 @@
// EmitVLASize - Generate code for any VLA size expressions that might occur
// in a variably modified type. If Ty is a VLA, will return the value that
// corresponds to the size in bytes of the VLA type. Will return 0 otherwise.
+ ///
+ /// This function can be called with a null (unreachable) insert point.
llvm::Value *EmitVLASize(QualType Ty);
// GetVLASize - Returns an LLVM value that corresponds to the size in bytes
@@ -537,9 +543,21 @@
// Declaration Emission
//===--------------------------------------------------------------------===//
+ /// EmitDecl - Emit a declaration.
+ ///
+ /// This function can be called with a null (unreachable) insert point.
void EmitDecl(const Decl &D);
+
+ /// EmitBlockVarDecl - Emit a block variable declaration.
+ ///
+ /// This function can be called with a null (unreachable) insert point.
void EmitBlockVarDecl(const VarDecl &D);
+
+ /// EmitLocalBlockVarDecl - Emit a local block variable declaration.
+ ///
+ /// This function can be called with a null (unreachable) insert point.
void EmitLocalBlockVarDecl(const VarDecl &D);
+
void EmitStaticBlockVarDecl(const VarDecl &D);
/// EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl.