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Author SHA1 Message Date
Chris Dewhurst c59f7c745b [Sparc][LEON] Removed the parts of the errata fixes implemented using inline assembly as this is not the desired behaviour for end-users. Small change to a unit test to implement this without requiring the inline assembly. 
llvm-svn: 281047
 2016-09-09 14:16:51 +00:00
James Y Knight 2cc9da9a65 Revert "[Sparc] Leon errata fix passes." 
...and the two followup commits:
Revert "[Sparc][Leon] Missed resetting option flags from check-in 278489."
Revert "[Sparc][Leon] Errata fixes for various errata in different
versions of the Leon variants of the Sparc 32 bit processor."

This reverts commit r274856, r278489, and r278492.

llvm-svn: 278511
 2016-08-12 14:48:09 +00:00
Chris Dewhurst 829f8efe55 [Sparc][Leon] Errata fixes for various errata in different versions of the Leon variants of the Sparc 32 bit processor. 
The nature of the errata are listed in the comments preceding the errata fix passes. Relevant unit tests are implemented for each of these.

These changes update older versions of these errata fixes with improvements to code and unit tests.

Differential Revision: https://reviews.llvm.org/D21960

llvm-svn: 278489
 2016-08-12 09:34:26 +00:00
Chris Dewhurst 4f7cac3674 [Sparc][LEON] LEON Erratum fix. Insert NOP after LD or LDF instruction. 
Due to an erratum in some versions of LEON, we must insert a NOP after any LD or LDF instruction to ensure the processor has time to load the value correctly before using it. This pass will implement that erratum fix.

The code will have no effect for other Sparc, but non-LEON processors.

Differential Review: http://reviews.llvm.org/D20353

llvm-svn: 270417
 2016-05-23 10:56:36 +00:00