forked from OSchip/llvm-project
[NFC][PhaseOrdering] Add test showing SROA not being performed after loop unrolling
This commit is contained in:
Roman Lebedev
parent
fa33235df5
commit
bb6f4d32aa
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@ -0,0 +1,234 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -O3 -S | FileCheck %s --check-prefixes=CHECK,OLDPM
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; RUN: opt < %s -passes='default<O3>' -aa-pipeline=default -S | FileCheck %s --check-prefixes=CHECK,NEWPM
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; This is based on the following most basic C++ code:
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;
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; #include <array>
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; void use(int);
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; void foo(int cnt) {
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; std::array<int, 6> arr;
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; for(int& elt : arr)
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; elt = ++cnt;
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; for(int& elt : arr)
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; use(elt);
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; }
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;
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; Not only should the loops be unrolled, no alloca's should be left there.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%"struct.std::array" = type { [6 x i32] }
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define dso_local void @_Z3fooi(i32 %cnt) {
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; OLDPM-LABEL: @_Z3fooi(
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; OLDPM-NEXT: entry:
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; OLDPM-NEXT: [[ARR:%.*]] = alloca %"struct.std::array", align 16
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; OLDPM-NEXT: [[TMP0:%.*]] = bitcast %"struct.std::array"* [[ARR]] to i8*
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; OLDPM-NEXT: call void @llvm.lifetime.start.p0i8(i64 24, i8* nonnull [[TMP0]])
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; OLDPM-NEXT: [[ARRAYDECAY_I_I_I:%.*]] = getelementptr inbounds %"struct.std::array", %"struct.std::array"* [[ARR]], i64 0, i32 0, i64 0
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; OLDPM-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds %"struct.std::array", %"struct.std::array"* [[ARR]], i64 0, i32 0, i64 1
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; OLDPM-NEXT: [[INCDEC_PTR_1:%.*]] = getelementptr inbounds %"struct.std::array", %"struct.std::array"* [[ARR]], i64 0, i32 0, i64 2
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; OLDPM-NEXT: [[INCDEC_PTR_2:%.*]] = getelementptr inbounds %"struct.std::array", %"struct.std::array"* [[ARR]], i64 0, i32 0, i64 3
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; OLDPM-NEXT: [[TMP1:%.*]] = insertelement <4 x i32> undef, i32 [[CNT:%.*]], i32 0
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; OLDPM-NEXT: [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> undef, <4 x i32> zeroinitializer
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; OLDPM-NEXT: [[TMP3:%.*]] = add nsw <4 x i32> [[TMP2]], <i32 1, i32 2, i32 3, i32 4>
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; OLDPM-NEXT: [[TMP4:%.*]] = bitcast %"struct.std::array"* [[ARR]] to <4 x i32>*
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; OLDPM-NEXT: store <4 x i32> [[TMP3]], <4 x i32>* [[TMP4]], align 16
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; OLDPM-NEXT: [[INCDEC_PTR_3:%.*]] = getelementptr inbounds %"struct.std::array", %"struct.std::array"* [[ARR]], i64 0, i32 0, i64 4
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; OLDPM-NEXT: [[INC_4:%.*]] = add nsw i32 [[CNT]], 5
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; OLDPM-NEXT: store i32 [[INC_4]], i32* [[INCDEC_PTR_3]], align 16
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; OLDPM-NEXT: [[INC_5:%.*]] = add nsw i32 [[CNT]], 6
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; OLDPM-NEXT: [[TMP5:%.*]] = load i32, i32* [[ARRAYDECAY_I_I_I]], align 16
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; OLDPM-NEXT: call void @_Z3usei(i32 [[TMP5]])
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; OLDPM-NEXT: [[TMP6:%.*]] = load i32, i32* [[INCDEC_PTR]], align 4
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; OLDPM-NEXT: call void @_Z3usei(i32 [[TMP6]])
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; OLDPM-NEXT: [[TMP7:%.*]] = load i32, i32* [[INCDEC_PTR_1]], align 8
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; OLDPM-NEXT: call void @_Z3usei(i32 [[TMP7]])
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; OLDPM-NEXT: [[TMP8:%.*]] = load i32, i32* [[INCDEC_PTR_2]], align 4
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; OLDPM-NEXT: call void @_Z3usei(i32 [[TMP8]])
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; OLDPM-NEXT: [[TMP9:%.*]] = load i32, i32* [[INCDEC_PTR_3]], align 16
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; OLDPM-NEXT: call void @_Z3usei(i32 [[TMP9]])
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; OLDPM-NEXT: call void @_Z3usei(i32 [[INC_5]])
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; OLDPM-NEXT: call void @llvm.lifetime.end.p0i8(i64 24, i8* nonnull [[TMP0]])
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; OLDPM-NEXT: ret void
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;
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; NEWPM-LABEL: @_Z3fooi(
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; NEWPM-NEXT: entry:
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; NEWPM-NEXT: [[INC:%.*]] = add nsw i32 [[CNT:%.*]], 1
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; NEWPM-NEXT: [[INC_1:%.*]] = add nsw i32 [[CNT]], 2
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; NEWPM-NEXT: [[INC_2:%.*]] = add nsw i32 [[CNT]], 3
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; NEWPM-NEXT: [[INC_3:%.*]] = add nsw i32 [[CNT]], 4
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; NEWPM-NEXT: [[INC_4:%.*]] = add nsw i32 [[CNT]], 5
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; NEWPM-NEXT: [[INC_5:%.*]] = add nsw i32 [[CNT]], 6
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; NEWPM-NEXT: call void @_Z3usei(i32 [[INC]])
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; NEWPM-NEXT: call void @_Z3usei(i32 [[INC_1]])
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; NEWPM-NEXT: call void @_Z3usei(i32 [[INC_2]])
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; NEWPM-NEXT: call void @_Z3usei(i32 [[INC_3]])
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; NEWPM-NEXT: call void @_Z3usei(i32 [[INC_4]])
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; NEWPM-NEXT: call void @_Z3usei(i32 [[INC_5]])
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; NEWPM-NEXT: ret void
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;
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entry:
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%cnt.addr = alloca i32
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%arr = alloca %"struct.std::array"
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%__range1 = alloca %"struct.std::array"*
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%__begin1 = alloca i32*
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%__end1 = alloca i32*
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%elt = alloca i32*
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%__range12 = alloca %"struct.std::array"*
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%__begin13 = alloca i32*
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%__end15 = alloca i32*
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%elt11 = alloca i32*
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store i32 %cnt, i32* %cnt.addr
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%0 = bitcast %"struct.std::array"* %arr to i8*
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call void @llvm.lifetime.start.p0i8(i64 24, i8* %0)
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%1 = bitcast %"struct.std::array"** %__range1 to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %1)
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store %"struct.std::array"* %arr, %"struct.std::array"** %__range1
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%2 = bitcast i32** %__begin1 to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %2)
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%3 = load %"struct.std::array"*, %"struct.std::array"** %__range1
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%call = call i32* @_ZNSt5arrayIiLm6EE5beginEv(%"struct.std::array"* %3)
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store i32* %call, i32** %__begin1
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%4 = bitcast i32** %__end1 to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %4)
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%5 = load %"struct.std::array"*, %"struct.std::array"** %__range1
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%call1 = call i32* @_ZNSt5arrayIiLm6EE3endEv(%"struct.std::array"* %5)
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store i32* %call1, i32** %__end1
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br label %for.cond
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for.cond:
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%6 = load i32*, i32** %__begin1
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%7 = load i32*, i32** %__end1
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%cmp = icmp ne i32* %6, %7
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.cond.cleanup:
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%8 = bitcast i32** %__end1 to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %8)
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%9 = bitcast i32** %__begin1 to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %9)
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%10 = bitcast %"struct.std::array"** %__range1 to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %10)
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br label %for.end
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for.body:
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%11 = bitcast i32** %elt to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %11)
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%12 = load i32*, i32** %__begin1
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store i32* %12, i32** %elt
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%13 = load i32, i32* %cnt.addr
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%inc = add nsw i32 %13, 1
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store i32 %inc, i32* %cnt.addr
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%14 = load i32*, i32** %elt
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store i32 %inc, i32* %14
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%15 = bitcast i32** %elt to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %15)
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br label %for.inc
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for.inc:
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%16 = load i32*, i32** %__begin1
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%incdec.ptr = getelementptr inbounds i32, i32* %16, i32 1
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store i32* %incdec.ptr, i32** %__begin1
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br label %for.cond
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for.end:
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%17 = bitcast %"struct.std::array"** %__range12 to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %17)
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store %"struct.std::array"* %arr, %"struct.std::array"** %__range12
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%18 = bitcast i32** %__begin13 to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %18)
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%19 = load %"struct.std::array"*, %"struct.std::array"** %__range12
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%call4 = call i32* @_ZNSt5arrayIiLm6EE5beginEv(%"struct.std::array"* %19)
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store i32* %call4, i32** %__begin13
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%20 = bitcast i32** %__end15 to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %20)
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%21 = load %"struct.std::array"*, %"struct.std::array"** %__range12
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%call6 = call i32* @_ZNSt5arrayIiLm6EE3endEv(%"struct.std::array"* %21)
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store i32* %call6, i32** %__end15
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br label %for.cond7
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for.cond7:
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%22 = load i32*, i32** %__begin13
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%23 = load i32*, i32** %__end15
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%cmp8 = icmp ne i32* %22, %23
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br i1 %cmp8, label %for.body10, label %for.cond.cleanup9
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for.cond.cleanup9:
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%24 = bitcast i32** %__end15 to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %24)
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%25 = bitcast i32** %__begin13 to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %25)
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%26 = bitcast %"struct.std::array"** %__range12 to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %26)
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br label %for.end14
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for.body10:
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%27 = bitcast i32** %elt11 to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %27)
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%28 = load i32*, i32** %__begin13
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store i32* %28, i32** %elt11
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%29 = load i32*, i32** %elt11
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%30 = load i32, i32* %29
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call void @_Z3usei(i32 %30)
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%31 = bitcast i32** %elt11 to i8*
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %31)
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br label %for.inc12
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for.inc12:
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%32 = load i32*, i32** %__begin13
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%incdec.ptr13 = getelementptr inbounds i32, i32* %32, i32 1
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store i32* %incdec.ptr13, i32** %__begin13
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br label %for.cond7
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for.end14:
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%33 = bitcast %"struct.std::array"* %arr to i8*
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call void @llvm.lifetime.end.p0i8(i64 24, i8* %33)
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ret void
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}
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
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define linkonce_odr dso_local i32* @_ZNSt5arrayIiLm6EE5beginEv(%"struct.std::array"* %this) {
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entry:
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%this.addr = alloca %"struct.std::array"*
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store %"struct.std::array"* %this, %"struct.std::array"** %this.addr
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%this1 = load %"struct.std::array"*, %"struct.std::array"** %this.addr
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%call = call i32* @_ZNSt5arrayIiLm6EE4dataEv(%"struct.std::array"* %this1)
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ret i32* %call
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}
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define linkonce_odr dso_local i32* @_ZNSt5arrayIiLm6EE3endEv(%"struct.std::array"* %this) {
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entry:
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%this.addr = alloca %"struct.std::array"*
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store %"struct.std::array"* %this, %"struct.std::array"** %this.addr
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%this1 = load %"struct.std::array"*, %"struct.std::array"** %this.addr
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%call = call i32* @_ZNSt5arrayIiLm6EE4dataEv(%"struct.std::array"* %this1)
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%add.ptr = getelementptr inbounds i32, i32* %call, i64 6
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ret i32* %add.ptr
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}
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
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declare dso_local void @_Z3usei(i32)
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define linkonce_odr dso_local i32* @_ZNSt5arrayIiLm6EE4dataEv(%"struct.std::array"* %this) {
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entry:
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%this.addr = alloca %"struct.std::array"*
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store %"struct.std::array"* %this, %"struct.std::array"** %this.addr
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%this1 = load %"struct.std::array"*, %"struct.std::array"** %this.addr
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%_M_elems = getelementptr inbounds %"struct.std::array", %"struct.std::array"* %this1, i32 0, i32 0
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%call = call i32* @_ZNSt14__array_traitsIiLm6EE6_S_ptrERA6_Ki([6 x i32]* nonnull align 4 dereferenceable(24) %_M_elems)
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ret i32* %call
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}
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define linkonce_odr dso_local i32* @_ZNSt14__array_traitsIiLm6EE6_S_ptrERA6_Ki([6 x i32]* nonnull align 4 dereferenceable(24) %__t) {
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entry:
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%__t.addr = alloca [6 x i32]*
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store [6 x i32]* %__t, [6 x i32]** %__t.addr
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%0 = load [6 x i32]*, [6 x i32]** %__t.addr
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%arraydecay = getelementptr inbounds [6 x i32], [6 x i32]* %0, i64 0, i64 0
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ret i32* %arraydecay
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}
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