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authorBill Wendling <isanbard@gmail.com>2008-11-30 13:08:13 +0000
committerBill Wendling <isanbard@gmail.com>2008-11-30 13:08:13 +0000
commit7f0ef6b325d0f6061c584ab93ebb083b87bca4ff (patch)
treefdce24fc331229e1683b504ac65d4b91b6d04172 /test
parent7c7048ecc688d57d10689009719dc2513a03250e (diff)
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Implement (A&((~A)|B)) -> A&B transformation in the instruction combiner. This
takes care of all permutations of this pattern. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60290 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r--test/Transforms/InstCombine/and-not-or.ll36
1 files changed, 36 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/and-not-or.ll b/test/Transforms/InstCombine/and-not-or.ll
new file mode 100644
index 0000000..b183b21
--- /dev/null
+++ b/test/Transforms/InstCombine/and-not-or.ll
@@ -0,0 +1,36 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {and i32 %y, %x} | count 2
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {and i32 %x, %y} | count 2
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {xor}
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {or}
+
+define i32 @func1(i32 %x, i32 %y) nounwind {
+entry:
+ %n = xor i32 %y, -1
+ %o = or i32 %n, %x
+ %a = and i32 %o, %y
+ ret i32 %a
+}
+
+define i32 @func2(i32 %x, i32 %y) nounwind {
+entry:
+ %n = xor i32 %y, -1
+ %o = or i32 %x, %n
+ %a = and i32 %o, %y
+ ret i32 %a
+}
+
+define i32 @func3(i32 %x, i32 %y) nounwind {
+entry:
+ %n = xor i32 %y, -1
+ %o = or i32 %n, %x
+ %a = and i32 %y, %o
+ ret i32 %a
+}
+
+define i32 @func4(i32 %x, i32 %y) nounwind {
+entry:
+ %n = xor i32 %y, -1
+ %o = or i32 %x, %n
+ %a = and i32 %y, %o
+ ret i32 %a
+}