[llvm-commits] CVS: llvm/test/Transforms/InstCombine/udiv_select_to_select_shift.ll

[Reid Spencer]

Changes in directory llvm/test/Transforms/InstCombine:

udiv_select_to_select_shift.ll added (r1.1)
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Log message:

Add a test case for a particular udiv/select transform.


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Diffs of the changes:  (+17 -0)

 udiv_select_to_select_shift.ll |   17 +++++++++++++++++
 1 files changed, 17 insertions(+)


Index: llvm/test/Transforms/InstCombine/udiv_select_to_select_shift.ll
diff -c /dev/null llvm/test/Transforms/InstCombine/udiv_select_to_select_shift.ll:1.1
*** /dev/null	Mon Mar  5 16:51:18 2007
--- llvm/test/Transforms/InstCombine/udiv_select_to_select_shift.ll	Mon Mar  5 16:51:08 2007
***************
*** 0 ****
--- 1,17 ----
+ ; This tests that this transform:
+ ; udiv X, (Select Cond, C1, C2) --> Select Cond, (shr X, C1), (shr X, C2)
+ ;
+ ; RUN: llvm-as %s -o - | opt -instcombine | llvm-dis -f -o %t && \
+ ; RUN:   grep select %t | wc -l | grep 1 && \
+ ; RUN:   grep lshr %t | wc -l | grep 2 && \ 
+ ; RUN:   grep udiv %t | wc -l | grep 0
+ 
+ define i64 @test(i64 %X, i1 %Cond ) {
+ entry:
+         %divisor1 = select i1 %Cond, i64 8, i64 16
+         %quotient1 = udiv i64 %X, %divisor1
+         %divisor2 = select i1 %Cond, i64 8, i64 0
+         %quotient2 = udiv i64 %X, %divisor2
+         %sum = add i64 %quotient1, %quotient2
+         ret i64 %sum
+ }