| ; RUN: opt -debugify -loop-unroll -mcpu=znver3 -pass-remarks=loop-unroll -pass-remarks-analysis=loop-unroll < %s -S 2>&1 | FileCheck --check-prefixes=ALL,UNROLL %s |
| ; RUN: opt -debugify -loop-unroll -mcpu=znver3 -pass-remarks=TTI -pass-remarks-analysis=TTI < %s -S 2>&1 | FileCheck --check-prefixes=ALL,TTI %s |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; TTI: remark: <stdin>:7:1: advising against unrolling the loop because it contains a call |
| ; UNROLL: remark: <stdin>:14:1: unrolled loop by a factor of 8 with run-time trip count |
| |
| define void @contains_external_call(i32 %count) { |
| ; ALL-LABEL: @contains_external_call( |
| ; ALL-NOT: unroll |
| entry: |
| %cmp.not3 = icmp eq i32 %count, 0 |
| br i1 %cmp.not3, label %for.cond.cleanup, label %for.body |
| |
| for.body: |
| %i.04 = phi i32 [ %inc, %for.body ], [ 0, %entry ] |
| tail call void @sideeffect() |
| %inc = add nuw nsw i32 %i.04, 1 |
| %cmp.not = icmp eq i32 %inc, %count |
| br i1 %cmp.not, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| ret void |
| } |
| |
| declare void @sideeffect() |
| |
| define i32 @no_external_calls(i32 %count) { |
| ; ALL-LABEL: @no_external_calls( |
| ; ALL: unroll |
| entry: |
| %cmp.not5 = icmp eq i32 %count, 0 |
| br i1 %cmp.not5, label %for.end, label %for.body |
| |
| for.body: |
| %i.06 = phi i32 [ %inc, %for.body ], [ 0, %entry ] |
| %inc = add nuw nsw i32 %i.06, 1 |
| %cmp.not = icmp eq i32 %inc, %count |
| br i1 %cmp.not, label %for.end, label %for.body |
| |
| for.end: |
| ret i32 %count |
| } |