peel-loop-conditions-pgo-1.ll
1.18 KB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -S -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 4!
; 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}