; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -O3 -S | FileCheck %s
; RUN: opt < %s -passes="default<O3>" -S | FileCheck %s
; This is based on the following most basic C++ code:
;
; #include <array>
; void use(int);
; void foo(int cnt) {
; std::array<int, 6> arr;
; for(int& elt : arr)
; elt = ++cnt;
; for(int& elt : arr)
; use(elt);
; }
;
; Not only should the loops be unrolled, no alloca's should be left there.
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"
%"struct.std::array" = type { [6 x i32] }
define dso_local void @_Z3fooi(i32 %cnt) {
; CHECK-LABEL: @_Z3fooi(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[CNT:%.*]], 1
; CHECK-NEXT: [[INC_1:%.*]] = add nsw i32 [[CNT]], 2
; CHECK-NEXT: [[INC_2:%.*]] = add nsw i32 [[CNT]], 3
; CHECK-NEXT: [[INC_3:%.*]] = add nsw i32 [[CNT]], 4
; CHECK-NEXT: [[INC_4:%.*]] = add nsw i32 [[CNT]], 5
; CHECK-NEXT: [[INC_5:%.*]] = add nsw i32 [[CNT]], 6
; CHECK-NEXT: call void @_Z3usei(i32 [[INC]])
; CHECK-NEXT: call void @_Z3usei(i32 [[INC_1]])
; CHECK-NEXT: call void @_Z3usei(i32 [[INC_2]])
; CHECK-NEXT: call void @_Z3usei(i32 [[INC_3]])
; CHECK-NEXT: call void @_Z3usei(i32 [[INC_4]])
; CHECK-NEXT: call void @_Z3usei(i32 [[INC_5]])
; CHECK-NEXT: ret void
;
entry:
%cnt.addr = alloca i32
%arr = alloca %"struct.std::array"
%__range1 = alloca %"struct.std::array"*
%__begin1 = alloca i32*
%__end1 = alloca i32*
%elt = alloca i32*
%__range12 = alloca %"struct.std::array"*
%__begin13 = alloca i32*
%__end15 = alloca i32*
%elt11 = alloca i32*
store i32 %cnt, i32* %cnt.addr
%0 = bitcast %"struct.std::array"* %arr to i8*
call void @llvm.lifetime.start.p0i8(i64 24, i8* %0)
%1 = bitcast %"struct.std::array"** %__range1 to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %1)
store %"struct.std::array"* %arr, %"struct.std::array"** %__range1
%2 = bitcast i32** %__begin1 to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %2)
%3 = load %"struct.std::array"*, %"struct.std::array"** %__range1
%call = call i32* @_ZNSt5arrayIiLm6EE5beginEv(%"struct.std::array"* %3)
store i32* %call, i32** %__begin1
%4 = bitcast i32** %__end1 to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %4)
%5 = load %"struct.std::array"*, %"struct.std::array"** %__range1
%call1 = call i32* @_ZNSt5arrayIiLm6EE3endEv(%"struct.std::array"* %5)
store i32* %call1, i32** %__end1
br label %for.cond
for.cond:
%6 = load i32*, i32** %__begin1
%7 = load i32*, i32** %__end1
%cmp = icmp ne i32* %6, %7
br i1 %cmp, label %for.body, label %for.cond.cleanup
for.cond.cleanup:
%8 = bitcast i32** %__end1 to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %8)
%9 = bitcast i32** %__begin1 to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %9)
%10 = bitcast %"struct.std::array"** %__range1 to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %10)
br label %for.end
for.body:
%11 = bitcast i32** %elt to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %11)
%12 = load i32*, i32** %__begin1
store i32* %12, i32** %elt
%13 = load i32, i32* %cnt.addr
%inc = add nsw i32 %13, 1
store i32 %inc, i32* %cnt.addr
%14 = load i32*, i32** %elt
store i32 %inc, i32* %14
%15 = bitcast i32** %elt to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %15)
br label %for.inc
for.inc:
%16 = load i32*, i32** %__begin1
%incdec.ptr = getelementptr inbounds i32, i32* %16, i32 1
store i32* %incdec.ptr, i32** %__begin1
br label %for.cond
for.end:
%17 = bitcast %"struct.std::array"** %__range12 to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %17)
store %"struct.std::array"* %arr, %"struct.std::array"** %__range12
%18 = bitcast i32** %__begin13 to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %18)
%19 = load %"struct.std::array"*, %"struct.std::array"** %__range12
%call4 = call i32* @_ZNSt5arrayIiLm6EE5beginEv(%"struct.std::array"* %19)
store i32* %call4, i32** %__begin13
%20 = bitcast i32** %__end15 to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %20)
%21 = load %"struct.std::array"*, %"struct.std::array"** %__range12
%call6 = call i32* @_ZNSt5arrayIiLm6EE3endEv(%"struct.std::array"* %21)
store i32* %call6, i32** %__end15
br label %for.cond7
for.cond7:
%22 = load i32*, i32** %__begin13
%23 = load i32*, i32** %__end15
%cmp8 = icmp ne i32* %22, %23
br i1 %cmp8, label %for.body10, label %for.cond.cleanup9
for.cond.cleanup9:
%24 = bitcast i32** %__end15 to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %24)
%25 = bitcast i32** %__begin13 to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %25)
%26 = bitcast %"struct.std::array"** %__range12 to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %26)
br label %for.end14
for.body10:
%27 = bitcast i32** %elt11 to i8*
call void @llvm.lifetime.start.p0i8(i64 8, i8* %27)
%28 = load i32*, i32** %__begin13
store i32* %28, i32** %elt11
%29 = load i32*, i32** %elt11
%30 = load i32, i32* %29
call void @_Z3usei(i32 %30)
%31 = bitcast i32** %elt11 to i8*
call void @llvm.lifetime.end.p0i8(i64 8, i8* %31)
br label %for.inc12
for.inc12:
%32 = load i32*, i32** %__begin13
%incdec.ptr13 = getelementptr inbounds i32, i32* %32, i32 1
store i32* %incdec.ptr13, i32** %__begin13
br label %for.cond7
for.end14:
%33 = bitcast %"struct.std::array"* %arr to i8*
call void @llvm.lifetime.end.p0i8(i64 24, i8* %33)
ret void
}
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
define linkonce_odr dso_local i32* @_ZNSt5arrayIiLm6EE5beginEv(%"struct.std::array"* %this) {
entry:
%this.addr = alloca %"struct.std::array"*
store %"struct.std::array"* %this, %"struct.std::array"** %this.addr
%this1 = load %"struct.std::array"*, %"struct.std::array"** %this.addr
%call = call i32* @_ZNSt5arrayIiLm6EE4dataEv(%"struct.std::array"* %this1)
ret i32* %call
}
define linkonce_odr dso_local i32* @_ZNSt5arrayIiLm6EE3endEv(%"struct.std::array"* %this) {
entry:
%this.addr = alloca %"struct.std::array"*
store %"struct.std::array"* %this, %"struct.std::array"** %this.addr
%this1 = load %"struct.std::array"*, %"struct.std::array"** %this.addr
%call = call i32* @_ZNSt5arrayIiLm6EE4dataEv(%"struct.std::array"* %this1)
%add.ptr = getelementptr inbounds i32, i32* %call, i64 6
ret i32* %add.ptr
}
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
declare dso_local void @_Z3usei(i32)
define linkonce_odr dso_local i32* @_ZNSt5arrayIiLm6EE4dataEv(%"struct.std::array"* %this) {
entry:
%this.addr = alloca %"struct.std::array"*
store %"struct.std::array"* %this, %"struct.std::array"** %this.addr
%this1 = load %"struct.std::array"*, %"struct.std::array"** %this.addr
%_M_elems = getelementptr inbounds %"struct.std::array", %"struct.std::array"* %this1, i32 0, i32 0
%call = call i32* @_ZNSt14__array_traitsIiLm6EE6_S_ptrERA6_Ki([6 x i32]* nonnull align 4 dereferenceable(24) %_M_elems)
ret i32* %call
}
define linkonce_odr dso_local i32* @_ZNSt14__array_traitsIiLm6EE6_S_ptrERA6_Ki([6 x i32]* nonnull align 4 dereferenceable(24) %__t) {
entry:
%__t.addr = alloca [6 x i32]*
store [6 x i32]* %__t, [6 x i32]** %__t.addr
%0 = load [6 x i32]*, [6 x i32]** %__t.addr
%arraydecay = getelementptr inbounds [6 x i32], [6 x i32]* %0, i64 0, i64 0
ret i32* %arraydecay
}