Figure 1.9 from the Dragon Book

Vinay Kakade <>
20 Aug 2001 01:46:20 -0400

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Figure 1.9 from the Dragon Book (Vinay Kakade) (2001-08-20)
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From: Vinay Kakade <>
Newsgroups: comp.compilers
Date: 20 Aug 2001 01:46:20 -0400
Organization: Compilers Central
Keywords: books, question
Posted-Date: 20 Aug 2001 01:46:20 EDT


In figure 1.9 (Phases of Compiler)(Page10) of the Dragon Book, the phase
"error handler" is connected to the following phases:
1. Lexical Analyzer
2. Syntax Analyzer
3. Semantic Analyzer
4. Intermediate Code Generator
5. Code Optimizer
6. Code Generator.

I could not understand why the "error handler" needs to be connected
to "Intermediate Code Generator", "Code Optimizer" and "Code
Generator". In other words, for the compiler model in figure 1.9, is
it possible that some erroneous program reaches "Intermediate Code
Generator" phase?

With Thanks and Regards,
-Vinay Kakade.
[Sure, or those phases might report an internal error. -John]

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