diff options
Diffstat (limited to 'llvm/test/Transforms/PhaseOrdering/unswitch-cold-func.ll')
| -rw-r--r-- | llvm/test/Transforms/PhaseOrdering/unswitch-cold-func.ll | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/llvm/test/Transforms/PhaseOrdering/unswitch-cold-func.ll b/llvm/test/Transforms/PhaseOrdering/unswitch-cold-func.ll new file mode 100644 index 0000000..a6ebdf0 --- /dev/null +++ b/llvm/test/Transforms/PhaseOrdering/unswitch-cold-func.ll @@ -0,0 +1,125 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 + +; RUN: opt < %s -passes='pgo-force-function-attrs,function(loop-mssa(simple-loop-unswitch<nontrivial>))' -pgo-kind=pgo-instr-use-pipeline -pgo-cold-func-opt=optsize -S | FileCheck %s +; RUN: opt < %s -passes='pgo-force-function-attrs,function(loop-mssa(simple-loop-unswitch<nontrivial>))' -pgo-kind=pgo-instr-use-pipeline -pgo-cold-func-opt=minsize -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 function(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 @_Z11functionbiiPiS_S_(i1 %cond, i32 %M, i32 %N, ptr %A, ptr %B, ptr %C) !prof !36 { +; CHECK-LABEL: define void @_Z11functionbiiPiS_S_ +; CHECK-SAME: (i1 [[COND:%.*]], i32 [[M:%.*]], i32 [[N:%.*]], ptr [[A:%.*]], ptr [[B:%.*]], ptr [[C:%.*]]) {{.*}}{ +; 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} |