[clang] [clang][Dependency Scanning] Canonicalize Defines of a Compiler Invocation As Early As Possible (PR #159620)

[Jan Svoboda via cfe-commits]

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@@ -393,8 +393,6 @@ class DependencyScanningAction {
                      DiagnosticConsumer *DiagConsumer) {
     // Make a deep copy of the original Clang invocation.
     CompilerInvocation OriginalInvocation(*Invocation);
-    if (any(Service.getOptimizeArgs() & ScanningOptimizations::Macros))
-      canonicalizeDefines(OriginalInvocation.getPreprocessorOpts());
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jansvoboda11 wrote:

I'd probably just move these up and pass in `Invocation` instead of 
`OriginalInvocation`.

https://github.com/llvm/llvm-project/pull/159620
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