diff options
Diffstat (limited to 'llvm/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll b/llvm/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll new file mode 100644 index 00000000000..baaafefa81d --- /dev/null +++ b/llvm/test/Transforms/InstCombine/2006-04-28-ShiftShiftLongLong.ll @@ -0,0 +1,13 @@ +; RUN: opt < %s -instcombine -S | FileCheck %s + +; This cannot be turned into a sign extending cast! + +define i64 @test(i64 %X) { + %Y = shl i64 %X, 16 ; <i64> [#uses=1] +; CHECK: %Y = shl i64 %X, 16 + %Z = ashr i64 %Y, 16 ; <i64> [#uses=1] +; CHECK: %Z = ashr exact i64 %Y, 16 + ret i64 %Z +; CHECK: ret i64 %Z +} + |
