21c4adcdd8
Legalizer optimize a pair of div / mod to a call to divrem libcall if they are
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not legal. However, it should use a div instruction + mul + sub if divide is
legal. The rem legalization code was missing a check and incorrectly uses a
divrem libcall even when div is legal.
rdar://12481395
llvm-svn: 165778
2012-10-12 01:15:47 +00:00
8c2ad81238
Emit a single _udivmodsi4 libcall instead of two separate _udivsi3 and
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_umodsi3 libcalls if they have the same arguments. This optimization
was apparently broken if one of the node was replaced in place.
rdar://11714607
llvm-svn: 158900
2012-06-21 05:56:05 +00:00
ad40c0a425
revert my previous patches that introduced an additional parameter to the objectsize intrinsic.
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After a lot of discussion, we realized it's not the best option for run-time bounds checking
llvm-svn: 157255
2012-05-22 15:25:31 +00:00
01547b3ad2
change the objectsize intrinsic signature: add a 3rd parameter to denote the maximum runtime performance penalty that the user is willing to accept.
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This commit only adds the parameter. Code taking advantage of it will follow.
llvm-svn: 156473
2012-05-09 15:52:43 +00:00
bc1589945d
Reenable use of divmod compiler_rt functions for iOS 5.0 and later.
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llvm-svn: 141368
2011-10-07 16:59:21 +00:00
c5242b0e78
Remove test for iOS divmod function, since that is disabled for now.
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llvm-svn: 130769
2011-05-03 17:54:49 +00:00
5f1ba4cd2d
Remove -use-divmod-libcall. Let targets opt in when they are available.
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llvm-svn: 129884
2011-04-20 22:20:12 +00:00
b14ce09fca
Fix divmod libcall lowering. Convert to {S|U}DIVREM first and then expand the node to a libcall. rdar://9280991
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llvm-svn: 129633
2011-04-16 03:08:26 +00:00
a7c7b54dde
Change -arm-divmod-libcall to a target neutral option.
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llvm-svn: 129045
2011-04-07 00:58:44 +00:00
a6a992a662
Add test case.
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llvm-svn: 128707
2011-04-01 06:27:25 +00:00
Evan Cheng