| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -slp-vectorizer -S < %s 2>&1 | FileCheck %s |
| ; REQUIRES: asserts |
| |
| ; Given LLVM IR caused associative reduction matching routine crash in SLP. |
| ; The routines begins with select as integer Umax reduction kind |
| ; and then follows to llvm.umax intrinsic call which also matched |
| ; to UMax and thus same reduction kind is returned. |
| ; The routine's later code merely assumes the instruction to be a select. |
| |
| define dso_local void @test() { |
| ; CHECK-LABEL: @test( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 undef, label [[NEXT:%.*]], label [[THEN:%.*]] |
| ; CHECK: then: |
| ; CHECK-NEXT: [[UM:%.*]] = call i8 @llvm.umax.i8(i8 0, i8 undef) |
| ; CHECK-NEXT: [[SELCMP:%.*]] = icmp ult i8 [[UM]], undef |
| ; CHECK-NEXT: [[I0:%.*]] = select i1 [[SELCMP]], i8 undef, i8 [[UM]] |
| ; CHECK-NEXT: br label [[NEXT]] |
| ; CHECK: next: |
| ; CHECK-NEXT: [[T7_0:%.*]] = phi i8 [ undef, [[ENTRY:%.*]] ], [ [[I0]], [[THEN]] ] |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br i1 undef, label %next, label %then |
| |
| then: |
| %um = call i8 @llvm.umax.i8(i8 0, i8 undef) |
| %selcmp = icmp ult i8 %um, undef |
| %i0 = select i1 %selcmp, i8 undef, i8 %um |
| br label %next |
| |
| next: |
| %t7.0 = phi i8 [ undef, %entry ], [ %i0, %then ] |
| ret void |
| } |
| |
| declare i8 @llvm.umax.i8(i8, i8) |
| |
