| Bjorn Pettersson | 3961603 | 2016-10-06 09:56:21 +0000 | [diff] [blame] | 1 | ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| 2 | ; RUN: opt < %s -instsimplify -S | FileCheck %s |
| 3 | |
| 4 | ; If computeKnownBits can do a simple look-through for extractelement |
| 5 | ; then instsimplify will know that %elt1 is non-negative at icmp. |
| 6 | define i1 @computeKnownBits_look_through_extractelt(<2 x i8> %vecin) { |
| 7 | ; CHECK-LABEL: @computeKnownBits_look_through_extractelt( |
| 8 | ; CHECK-NEXT: ret i1 false |
| 9 | ; |
| 10 | %vec = zext <2 x i8> %vecin to <2 x i32> |
| 11 | %elt1 = extractelement <2 x i32> %vec, i32 1 |
| 12 | %bool = icmp slt i32 %elt1, 0 |
| 13 | ret i1 %bool |
| 14 | } |
| 15 | |
| 16 | ; If computeNumSignBits can do a simple look-through for extractelement |
| 17 | ; then instsimplify will remove the ashr. |
| 18 | define i32 @computeNumSignBits_look_through_extractelt(<2 x i1> %vecin) { |
| 19 | ; CHECK-LABEL: @computeNumSignBits_look_through_extractelt( |
| 20 | ; CHECK-NEXT: [[VEC:%.*]] = sext <2 x i1> [[VEC:%.*]]in to <2 x i32> |
| 21 | ; CHECK-NEXT: [[ELT0:%.*]] = extractelement <2 x i32> [[VEC]], i32 0 |
| 22 | ; CHECK-NEXT: ret i32 [[ELT0]] |
| 23 | ; |
| 24 | %vec = sext <2 x i1> %vecin to <2 x i32> |
| 25 | %elt0 = extractelement <2 x i32> %vec, i32 0 |
| 26 | %ashr = ashr i32 %elt0, 5 |
| 27 | ret i32 %ashr |
| 28 | } |