| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -loop-unroll -unroll-threshold=300 -S < %s | FileCheck %s |
| |
| ; This test caused a compile-time explosion in ValueTracking |
| ; because we cloned the assume value and call greatly and |
| ; then spent far too long analyzing those. |
| |
| define void @PR49171(i32 %arg) { |
| ; CHECK-LABEL: @PR49171( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[ASSUME:%.*]] = icmp eq i32 0, [[ARG:%.*]] |
| ; CHECK-NEXT: call void @llvm.assume(i1 [[ASSUME]]) |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ] |
| %iv2 = phi i32 [ 0, %entry ], [ %arg, %loop ] |
| %assume = icmp eq i32 %iv2, %arg |
| call void @llvm.assume(i1 %assume) |
| %iv.inc = add nuw nsw i32 %iv, 1 |
| %exitcond = icmp eq i32 %iv.inc, 50 ; Increase me! |
| br i1 %exitcond, label %exit, label %loop |
| |
| exit: |
| ret void |
| } |
| |
| declare void @llvm.assume(i1) |
