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| author | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | 2017-12-12 12:09:34 +0000 |
|---|---|---|
| committer | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | 2017-12-12 12:09:34 +0000 |
| commit | 28016c6005d2bcd51378bcc43e1f57944be22e16 (patch) | |
| tree | 5c77e34f24f39063360df66dc284e5e79983082f /test/CodeGen/PowerPC/testComparesllgeuc.ll | |
| parent | efc3af1a052dac3a08bea7c5288937c5f147606e (diff) | |
[PowerPC] Follow-up to r318436 to get the missed CSE opportunities
The last of the three patches that https://reviews.llvm.org/D40348 was
broken up into.
Canonicalize the materialization of constants so that they are more likely
to be CSE'd regardless of the bit-width of the use. If a constant can be
materialized using PPC::LI, materialize it the same way always.
For example:
li 4, -1
li 4, 255
li 4, 65535
are equivalent if the uses only use the low byte. Canonicalize it to the
first form.
Differential Revision: https://reviews.llvm.org/D40348
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320473 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/testComparesllgeuc.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/testComparesllgeuc.ll | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/test/CodeGen/PowerPC/testComparesllgeuc.ll b/test/CodeGen/PowerPC/testComparesllgeuc.ll index 6369cdc23d9..e56e09b37ac 100644 --- a/test/CodeGen/PowerPC/testComparesllgeuc.ll +++ b/test/CodeGen/PowerPC/testComparesllgeuc.ll @@ -105,7 +105,7 @@ entry: store i8 %conv1, i8* @glob ret void ; CHECK-LABEL: @test_llgeuc_sext_z_store -; CHECK: li [[REG1:r[0-9]+]], 255 +; CHECK: li [[REG1:r[0-9]+]], -1 ; CHECK: stb [[REG1]] ; CHECK: blr } |