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| author | Sanjay Patel <spatel@rotateright.com> | 2017-09-18 22:05:35 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2017-09-18 22:05:35 +0000 |
| commit | f31b1a00ea4d2916dfcc0fd476bebdb0fc60ff9f (patch) | |
| tree | 58b2fbe068da8af4c73d501d153c817d79ce91b0 /llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp | |
| parent | 1468677cbe9a39a8032a2e3e5363ffe74be96b40 (diff) | |
| download | bcm5719-llvm-f31b1a00ea4d2916dfcc0fd476bebdb0fc60ff9f.tar.gz bcm5719-llvm-f31b1a00ea4d2916dfcc0fd476bebdb0fc60ff9f.zip | |
[DAGCombiner] fold assertzexts separated by trunc
If we have an AssertZext of a truncated value that has already been AssertZext'ed,
we can assert on the wider source op to improve the zext-y knowledge:
assert (trunc (assert X, i8) to iN), i1 --> trunc (assert X, i1) to iN
This moves a fold from being Mips-specific to general combining, and x86 shows
improvements.
Differential Revision: https://reviews.llvm.org/D37017
llvm-svn: 313577
Diffstat (limited to 'llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp')
0 files changed, 0 insertions, 0 deletions
