; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt < %s -passes='require<profile-summary>,function(loop-mssa(simple-loop-unswitch<nontrivial>))' -S | FileCheck %s
;; Check that non-trivial loop unswitching is not applied to a cold loop in a
;; cold loop nest.
;; IR was generated from the following loop nest, profiled when called
;; with M=0 and N=0.
;; void hotFunction(bool cond, int M, int N, int * A, int *B, int *C) {
;; for (unsigned j = 0; j < M; j++)
;; for (unsigned i=0; i < N; i++) {
;; A[i] = B[i] + C[i];
;; if (cond) do_something();
;; }
;; }
define void @_Z11hotFunctionbiiPiS_S_(i1 %cond, i32 %M, i32 %N, ptr %A, ptr %B, ptr %C) !prof !36 {
; CHECK-LABEL: define void @_Z11hotFunctionbiiPiS_S_
; CHECK-SAME: (i1 [[COND:%.*]], i32 [[M:%.*]], i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]], ptr [[C:%.*]]) !prof [[PROF16:![0-9]+]] {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP19_NOT:%.*]] = icmp eq i32 [[M]], 0
; CHECK-NEXT: br i1 [[CMP19_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]], !prof [[PROF17:![0-9]+]]
; CHECK: for.cond1.preheader.lr.ph:
; CHECK-NEXT: [[CMP217_NOT:%.*]] = icmp eq i32 [[N]], 0
; CHECK-NEXT: br label [[FOR_COND1_PREHEADER:%.*]]
; CHECK: for.cond1.preheader:
; CHECK-NEXT: [[J_020:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER_LR_PH]] ], [ [[INC10:%.*]], [[FOR_COND_CLEANUP3:%.*]] ]
; CHECK-NEXT: br i1 [[CMP217_NOT]], label [[FOR_COND_CLEANUP3]], label [[FOR_BODY4_PREHEADER:%.*]]
; CHECK: for.body4.preheader:
; CHECK-NEXT: br label [[FOR_BODY4:%.*]]
; CHECK: for.cond.cleanup.loopexit:
; CHECK-NEXT: br label [[FOR_COND_CLEANUP]]
; CHECK: for.cond.cleanup:
; CHECK-NEXT: ret void
; CHECK: for.cond.cleanup3.loopexit:
; CHECK-NEXT: br label [[FOR_COND_CLEANUP3]]
; CHECK: for.cond.cleanup3:
; CHECK-NEXT: [[INC10]] = add nuw i32 [[J_020]], 1
; CHECK-NEXT: [[EXITCOND22_NOT:%.*]] = icmp eq i32 [[INC10]], [[M]]
; CHECK-NEXT: br i1 [[EXITCOND22_NOT]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]], label [[FOR_COND1_PREHEADER]], !prof [[PROF17]]
; CHECK: for.body4:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_INC:%.*]] ], [ 0, [[FOR_BODY4_PREHEADER]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[ARRAYIDX6:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX6]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP0]]
; CHECK-NEXT: [[ARRAYIDX8:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT: store i32 [[ADD]], ptr [[ARRAYIDX8]], align 4
; CHECK-NEXT: br i1 [[COND]], label [[IF_THEN:%.*]], label [[FOR_INC]]
; CHECK: if.then:
; CHECK-NEXT: tail call void @_Z12do_somethingv()
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP3_LOOPEXIT:%.*]], label [[FOR_BODY4]]
;
entry:
%cmp19.not = icmp eq i32 %M, 0
br i1 %cmp19.not, label %for.cond.cleanup, label %for.cond1.preheader.lr.ph, !prof !37
for.cond1.preheader.lr.ph:
%cmp217.not = icmp eq i32 %N, 0
br label %for.cond1.preheader
for.cond1.preheader:
%j.020 = phi i32 [ 0, %for.cond1.preheader.lr.ph ], [ %inc10, %for.cond.cleanup3 ]
br i1 %cmp217.not, label %for.cond.cleanup3, label %for.body4
for.cond.cleanup:
ret void
for.cond.cleanup3:
%inc10 = add nuw i32 %j.020, 1
%exitcond22.not = icmp eq i32 %inc10, %M
br i1 %exitcond22.not, label %for.cond.cleanup, label %for.cond1.preheader, !prof !37
for.body4:
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %for.cond1.preheader ]
%arrayidx = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
%0 = load i32, ptr %arrayidx, align 4
%arrayidx6 = getelementptr inbounds i32, ptr %C, i64 %indvars.iv
%1 = load i32, ptr %arrayidx6, align 4
%add = add nsw i32 %1, %0
%arrayidx8 = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
store i32 %add, ptr %arrayidx8, align 4
br i1 %cond, label %if.then, label %for.inc
if.then:
tail call void @_Z12do_somethingv()
br label %for.inc
for.inc:
%wide.trip.count = zext i32 %N to i64
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond.not, label %for.cond.cleanup3, label %for.body4
}
declare void @_Z12do_somethingv()
!llvm.module.flags = !{!6}
!6 = !{i32 1, !"ProfileSummary", !7}
!7 = !{!8, !9, !10, !11, !12, !13, !14, !15, !16, !17}
!8 = !{!"ProfileFormat", !"InstrProf"}
!9 = !{!"TotalCount", i64 1002}
!10 = !{!"MaxCount", i64 1000}
!11 = !{!"MaxInternalCount", i64 1000}
!12 = !{!"MaxFunctionCount", i64 1}
!13 = !{!"NumCounts", i64 6}
!14 = !{!"NumFunctions", i64 3}
!15 = !{!"IsPartialProfile", i64 0}
!16 = !{!"PartialProfileRatio", double 0.000000e+00}
!17 = !{!"DetailedSummary", !18}
!18 = !{!19, !31, !34}
!19 = !{i32 10000, i64 1000, i32 1}
!31 = !{i32 999000, i64 1000, i32 1}
!34 = !{i32 999999, i64 1, i32 3}
!36 = !{!"function_entry_count", i64 1}
!37 = !{!"branch_weights", i32 1, i32 0}
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