diff options
Diffstat (limited to 'llvm/test/Transforms/InstCombine/fold-selective-shift.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/fold-selective-shift.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/fold-selective-shift.ll b/llvm/test/Transforms/InstCombine/fold-selective-shift.ll index 2b22965..dcfd933 100644 --- a/llvm/test/Transforms/InstCombine/fold-selective-shift.ll +++ b/llvm/test/Transforms/InstCombine/fold-selective-shift.ll @@ -21,6 +21,28 @@ define i16 @selective_shift_16(i32 %mask, i16 %upper, i16 %lower) { ret i16 %trunc } +; Will assert if InsertPoint is not set before creating an instruction +; with IRBuilder +define i16 @selective_shift_16_insertpt(i32 %mask, i16 %upper, i16 %lower) { +; CHECK-LABEL: define i16 @selective_shift_16_insertpt( +; CHECK-SAME: i32 [[MASK:%.*]], i16 [[UPPER:%.*]], i16 [[LOWER:%.*]]) { +; CHECK-NEXT: [[MASK_BIT:%.*]] = and i32 [[MASK]], 16 +; CHECK-NEXT: [[MASK_BIT_Z:%.*]] = icmp eq i32 [[MASK_BIT]], 0 +; CHECK-NEXT: [[SEL_V:%.*]] = select i1 [[MASK_BIT_Z]], i16 [[LOWER]], i16 [[UPPER]] +; CHECK-NEXT: [[ADD_ONE:%.*]] = add i16 [[SEL_V]], 1 +; CHECK-NEXT: ret i16 [[ADD_ONE]] +; + %mask.bit = and i32 %mask, 16 + %upper.zext = zext i16 %upper to i32 + %upper.shl = shl nuw i32 %upper.zext, 16 + %lower.zext = zext i16 %lower to i32 + %pack = or disjoint i32 %upper.shl, %lower.zext + %sel = lshr i32 %pack, %mask.bit + %add.one = add i32 %sel, 1 + %trunc = trunc i32 %add.one to i16 + ret i16 %trunc +} + define i16 @selective_shift_16.commute(i32 %mask, i16 %upper, i16 %lower) { ; CHECK-LABEL: define i16 @selective_shift_16.commute( ; CHECK-SAME: i32 [[MASK:%.*]], i16 [[UPPER:%.*]], i16 [[LOWER:%.*]]) { |