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| author | Jingyue Wu <jingyue@google.com> | 2015-05-15 17:07:48 +0000 |
|---|---|---|
| committer | Jingyue Wu <jingyue@google.com> | 2015-05-15 17:07:48 +0000 |
| commit | 80a96d299a3ca1dfc0cb0ae3f75668d4f8c4d169 (patch) | |
| tree | bfc7eabb290287998ea51a51256a9e8234bfd2e5 /llvm/test | |
| parent | cfb0443af6a69ff98cf3b455b491046663ad65f5 (diff) | |
| download | bcm5719-llvm-80a96d299a3ca1dfc0cb0ae3f75668d4f8c4d169.tar.gz bcm5719-llvm-80a96d299a3ca1dfc0cb0ae3f75668d4f8c4d169.zip | |
[SLSR] handle (B | i) * S
Summary:
Consider (B | i) * S as (B + i) * S if B and i have no bits set in
common.
Test Plan: @or in slsr-mul.ll
Reviewers: broune, meheff
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D9788
llvm-svn: 237456
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/StraightLineStrengthReduce/slsr-mul.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/Transforms/StraightLineStrengthReduce/slsr-mul.ll b/llvm/test/Transforms/StraightLineStrengthReduce/slsr-mul.ll index 9b9fc9de4ff..56b1d1fc5cd 100644 --- a/llvm/test/Transforms/StraightLineStrengthReduce/slsr-mul.ll +++ b/llvm/test/Transforms/StraightLineStrengthReduce/slsr-mul.ll @@ -44,6 +44,29 @@ define void @non_canonicalized(i32 %b, i32 %s) { ret void } +define void @or(i32 %a, i32 %s) { + %b = shl i32 %a, 1 +; CHECK-LABEL: @or( + ; foo(b * s); + %mul0 = mul i32 %b, %s +; CHECK: [[base:[^ ]+]] = mul i32 + call void @foo(i32 %mul0) + + ; foo((b | 1) * s); + %b1 = or i32 %b, 1 + %mul1 = mul i32 %b1, %s +; CHECK: add i32 [[base]], %s + call void @foo(i32 %mul1) + + ; foo((b | 2) * s); + %b2 = or i32 %b, 2 + %mul2 = mul i32 %b2, %s +; CHECK: mul i32 %b2, %s + call void @foo(i32 %mul2) + + ret void +} + ; foo(a * b) ; foo((a + 1) * b) ; foo(a * (b + 1)) |
