| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -S -passes=loop-unroll,loop-unroll -verify-dom-info -debug-only=loop-unroll -unroll-peel-max-count=7 2>&1 | FileCheck %s |
| ; REQUIRES: asserts |
| |
| declare void @f1() |
| declare void @f2() |
| |
| ; Check that we can peel off iterations that make conditions true. |
| ; The second invocation of loop-unroll will do profile based peeling of |
| ; remained iterations. |
| define void @test1(i32 %k) !prof !4 { |
| ; CHECK: Loop Unroll: F[test1] Loop %for.body |
| ; CHECK: PEELING loop %for.body with iteration count 2! |
| ; CHECK: PEELING loop %for.body with iteration count 5! |
| ; CHECK: llvm.loop.unroll.disable |
| for.body.lr.ph: |
| br label %for.body |
| |
| for.body: |
| %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ] |
| %cmp1 = icmp ult i32 %i.05, 2 |
| br i1 %cmp1, label %if.then, label %if.else |
| |
| if.then: |
| call void @f1() |
| br label %for.inc |
| |
| if.else: |
| call void @f2() |
| br label %for.inc |
| |
| for.inc: |
| %inc = add nsw i32 %i.05, 1 |
| %cmp = icmp slt i32 %inc, %k |
| br i1 %cmp, label %for.body, label %for.end, !llvm.loop !1, !prof !2 |
| |
| for.end: |
| ret void |
| } |
| |
| !1 = distinct !{!1} |
| !2 = !{!"branch_weights", i32 6, i32 1} |
| !4 = !{!"function_entry_count", i64 1} |