llvm-project

Commit Graph

Author	SHA1	Message	Date
Hans Wennborg	4a61370b8f	Fix CHECK directives that weren't checking. llvm-svn: 246485	2015-08-31 21:10:35 +00:00
David Majnemer	bf7550e7ec	InstSimplify: Exact shifts of X by Y are X if X has the lsb set Exact shifts may not shift out any non-zero bits. Use computeKnownBits to determine when this occurs and just return the left hand side. This fixes PR21477. llvm-svn: 221325	2014-11-05 00:59:59 +00:00
David Majnemer	d205602a0b	InstCombine: Simplify FoldICmpCstShrCst This function was complicated by the fact that it tried to perform canonicalizations that were already preformed by InstSimplify. Remove this extra code and move the tests over to InstSimplify. Add asserts to make sure our preconditions hold before we make any assumptions. llvm-svn: 220314	2014-10-21 19:51:55 +00:00

Author

SHA1

Message

Date

Hans Wennborg

4a61370b8f

Fix CHECK directives that weren't checking.

llvm-svn: 246485

2015-08-31 21:10:35 +00:00

David Majnemer

bf7550e7ec

InstSimplify: Exact shifts of X by Y are X if X has the lsb set

Exact shifts may not shift out any non-zero bits. Use computeKnownBits
to determine when this occurs and just return the left hand side.

This fixes PR21477.

llvm-svn: 221325

2014-11-05 00:59:59 +00:00

David Majnemer

d205602a0b

InstCombine: Simplify FoldICmpCstShrCst

This function was complicated by the fact that it tried to perform
canonicalizations that were already preformed by InstSimplify.  Remove
this extra code and move the tests over to InstSimplify.  Add asserts to
make sure our preconditions hold before we make any assumptions.

llvm-svn: 220314

2014-10-21 19:51:55 +00:00

3 Commits