[llvm-commits] [PATCH][please review] Optimize ARM Position Independent Code Generation

[Yin Ma]

Hi 

 

Currently LLVM ARM backend is still using the x86 way to generate 

 position independent code. The algorithm retrieves the pointer of 

 global offset table at first. However, GCC has been using the label 

 relative offset to computer position independent code. The GCC way 

 results smaller code size in ARM architecture. This patch is to 

 implement GCC way to generate position independent code.

 

In the attachment.

Pic2.diff is the code patch

the rest of four files are the test validation results before and 

 after code changed

 

This patch addressed the problem I submitted before.  The default

Option has been set to off. A segment of redundant elimination code

has been removed.

 

Please give a review again

 

 

                           Yin 

 

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