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| author | Eric Christopher <echristo@apple.com> | 2011-07-14 06:23:09 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@apple.com> | 2011-07-14 06:23:09 +0000 |
| commit | 2b88e8fbfe077c59ca989323654785f00fe712be (patch) | |
| tree | 918cb1586d7bea10133bd73417f4adba7d6fa1c0 /test/CodeGen/ARM/fold-const.ll | |
| parent | d91aa14075d5c4c093ed1a84ea4b5397ce5f6eb4 (diff) | |
| download | llvm-2b88e8fbfe077c59ca989323654785f00fe712be.tar.gz llvm-2b88e8fbfe077c59ca989323654785f00fe712be.tar.bz2 llvm-2b88e8fbfe077c59ca989323654785f00fe712be.tar.xz | |
Add a testcase for r135123.
Part of rdar://9761830
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135133 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/fold-const.ll')
| -rw-r--r-- | test/CodeGen/ARM/fold-const.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/fold-const.ll b/test/CodeGen/ARM/fold-const.ll new file mode 100644 index 0000000000..227e4e8aaa --- /dev/null +++ b/test/CodeGen/ARM/fold-const.ll @@ -0,0 +1,14 @@ +; RUN: llc < %s -march=arm -mattr=+v7 | FileCheck %s + +define i32 @f(i32 %a) nounwind readnone optsize ssp { +entry: + %conv = zext i32 %a to i64 + %tmp1 = tail call i64 @llvm.ctlz.i64(i64 %conv) +; CHECK: clz +; CHECK-NOT: adds + %cast = trunc i64 %tmp1 to i32 + %sub = sub nsw i32 63, %cast + ret i32 %sub +} + +declare i64 @llvm.ctlz.i64(i64) nounwind readnone |