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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-09-21 16:26:41 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-09-21 16:26:41 +0000 |
| commit | e5bd3cf0006b7f5ec79533a827f5645197d75d2c (patch) | |
| tree | e9ab76aa7953eb7d3b1fd79ba88b125b63059bef /test | |
| parent | 30b483c94001927b3593ed200e823104bab51660 (diff) | |
InstCombine: Make sure we use the pre-zext type when creating a constant of a value that is zext'd.
Fixes PR13250.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164377 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/div-shift.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/div-shift.ll b/test/Transforms/InstCombine/div-shift.ll index a07f3ea949..e0372ebac1 100644 --- a/test/Transforms/InstCombine/div-shift.ll +++ b/test/Transforms/InstCombine/div-shift.ll @@ -21,3 +21,17 @@ define i64 @t2(i64 %x, i32 %y) nounwind { %3 = udiv i64 %x, %2 ret i64 %3 } + +; PR13250 +define i64 @t3(i64 %x, i32 %y) nounwind { +; CHECK: t3 +; CHECK-NOT: udiv +; CHECK-NEXT: %1 = add i32 %y, 2 +; CHECK-NEXT: %2 = zext i32 %1 to i64 +; CHECK-NEXT: %3 = lshr i64 %x, %2 +; CHECK-NEXT: ret i64 %3 + %1 = shl i32 4, %y + %2 = zext i32 %1 to i64 + %3 = udiv i64 %x, %2 + ret i64 %3 +} |