2006-04-28

Report-an-Apple-bug Friday! 36

This bug is -mtune (Instruction Scheduling) does not include Intel processors. It was filed on 2006-04-28 at 00:35 PDT.


Summary:

With the move to Intel processors, Xcode needs to support processor-specific optimization for them.

Steps to Reproduce:

  1. Get info on a target or project.
  2. Switch to the Build tab.
  3. Change the active Collection to one that includes GCC/Code Generation.
  4. Edit the "Instruction Scheduling" setting.

Expected Results:

At least pentium-m is listed, being (presumably) the most similar to Yonah (the "Core Solo"/"Core Duo" processors). Ideally, scheduling optimizations for Yonah itself should be added to GCC, with a matching listing in Xcode's pop-up menu.

Actual Results:

Only G3, G4, and G5 are listed (besides "None").

Regression:

This wasn't a problem before the move to Intel.

Notes:

Direct Yonah support isn't supported by GCC (yet) according to the GCC manual's page "i386 and x86-64 Options". GNU's current documentation doesn't list it either.


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