| ; REQUIRES: asserts |
| ; RUN: opt < %s -S -debug-only=loop-unroll -loop-unroll -unroll-runtime 2>&1 | FileCheck %s |
| ; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s |
| ; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll<no-profile-peeling>)' 2>&1 | FileCheck %s --check-prefixes=CHECK-NO-PEEL |
| |
| ; Make sure we use the profile information correctly to peel-off 3 iterations |
| ; from the loop, and update the branch weights for the peeled loop properly. |
| ; All side exits to deopt does not change weigths. |
| |
| ; CHECK: Loop Unroll: F[basic] |
| ; CHECK: PEELING loop %for.body with iteration count 4! |
| ; CHECK-NO-PEEL-NOT: PEELING loop %for.body |
| ; CHECK-LABEL: @basic |
| ; CHECK: br i1 %c, label %{{.*}}, label %side_exit, !prof !15 |
| ; CHECK: br i1 %{{.*}}, label %[[NEXT0:.*]], label %for.cond.for.end_crit_edge, !prof !16 |
| ; CHECK: [[NEXT0]]: |
| ; CHECK: br i1 %c, label %{{.*}}, label %side_exit, !prof !15 |
| ; CHECK: br i1 %{{.*}}, label %[[NEXT1:.*]], label %for.cond.for.end_crit_edge, !prof !17 |
| ; CHECK: [[NEXT1]]: |
| ; CHECK: br i1 %c, label %{{.*}}, label %side_exit, !prof !15 |
| ; CHECK: br i1 %{{.*}}, label %[[NEXT2:.*]], label %for.cond.for.end_crit_edge, !prof !18 |
| ; CHECK: [[NEXT2]]: |
| ; CHECK: br i1 %c, label %{{.*}}, label %side_exit.loopexit, !prof !15 |
| ; CHECK: br i1 %{{.*}}, label %for.body, label %{{.*}}, !prof !19 |
| |
| define i32 @basic(i32* %p, i32 %k, i1 %c) #0 !prof !15 { |
| entry: |
| %cmp3 = icmp slt i32 0, %k |
| br i1 %cmp3, label %for.body.lr.ph, label %for.end |
| |
| for.body.lr.ph: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.lr.ph, %for.body |
| %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %continue ] |
| %p.addr.04 = phi i32* [ %p, %for.body.lr.ph ], [ %incdec.ptr, %continue ] |
| %incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1 |
| store i32 %i.05, i32* %p.addr.04, align 4 |
| %inc = add nsw i32 %i.05, 1 |
| %cmp = icmp slt i32 %inc, %k |
| br i1 %c, label %continue, label %side_exit, !prof !17 |
| |
| continue: |
| br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !16 |
| |
| for.cond.for.end_crit_edge: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.cond.for.end_crit_edge, %entry |
| %res = phi i32 [ 0, %entry ], [ %inc, %for.cond.for.end_crit_edge ] |
| ret i32 %res |
| |
| side_exit: |
| %rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ] |
| ret i32 %rval |
| } |
| |
| declare i32 @llvm.experimental.deoptimize.i32(...) |
| |
| attributes #0 = { nounwind } |
| attributes #1 = { nounwind optsize } |
| |
| !llvm.module.flags = !{!1} |
| |
| !1 = !{i32 1, !"ProfileSummary", !2} |
| !2 = !{!3, !4, !5, !6, !7, !8, !9, !10} |
| !3 = !{!"ProfileFormat", !"InstrProf"} |
| !4 = !{!"TotalCount", i64 10} |
| !5 = !{!"MaxCount", i64 3} |
| !6 = !{!"MaxInternalCount", i64 1} |
| !7 = !{!"MaxFunctionCount", i64 3} |
| !8 = !{!"NumCounts", i64 2} |
| !9 = !{!"NumFunctions", i64 2} |
| !10 = !{!"DetailedSummary", !11} |
| !11 = !{!12, !13, !14} |
| !12 = !{i32 10000, i64 3, i32 2} |
| !13 = !{i32 999000, i64 1, i32 10} |
| !14 = !{i32 999999, i64 1, i32 10} |
| !15 = !{!"function_entry_count", i64 1} |
| !16 = !{!"branch_weights", i32 3001, i32 1001} |
| !17 = !{!"branch_weights", i32 1, i32 0} |
| |
| ; This is a weights of deopt side-exit. |
| ;CHECK: !15 = !{!"branch_weights", i32 1, i32 0} |
| ; This is a weights of latch and its copies. |
| ;CHECK: !16 = !{!"branch_weights", i32 3001, i32 1001} |
| ;CHECK: !17 = !{!"branch_weights", i32 2000, i32 1001} |
| ;CHECK: !18 = !{!"branch_weights", i32 999, i32 1001} |
| ;CHECK: !19 = !{!"branch_weights", i32 1, i32 1001} |
| |