6a144a2227
Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.
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llvm-svn: 145171
2011-11-27 06:54:59 +00:00
410ec4aad1
As Dan pointed out, movzbl, movsbl, and friends are nicer than their alias
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(movzx/movsx) because they give more information. Revert that part of the patch.
llvm-svn: 129498
2011-04-14 01:46:37 +00:00
7e07d6fb69
Have the X86 back-end emit the alias instead of what's being aliased. In most
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cases, it's much nicer and more informative reading the alias.
llvm-svn: 129497
2011-04-14 01:11:51 +00:00
b5499d09d1
Re-enable extension optimization pass.
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llvm-svn: 93313
2010-01-13 08:45:40 +00:00
d7d8f6d000
Disable opt-ext pass to unbreak the build for now.
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llvm-svn: 93286
2010-01-13 01:51:43 +00:00
30bebff456
Add a quick pass to optimize sign / zero extension instructions. For targets where the pre-extension values are available in the subreg of the result of the extension, replace the uses of the pre-extension value with the result + extract_subreg.
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For now, this pass is fairly conservative. It only perform the replacement when both the pre- and post- extension values are used in the block. It will miss cases where the post-extension values are live, but not used.
llvm-svn: 93278
2010-01-13 00:30:23 +00:00
Chris Lattner