; 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 ptr
%__begin1 = alloca ptr
%__end1 = alloca ptr
%elt = alloca ptr
%__range12 = alloca ptr
%__begin13 = alloca ptr
%__end15 = alloca ptr
%elt11 = alloca ptr
store i32 %cnt, ptr %cnt.addr
call void @llvm.lifetime.start.p0(i64 24, ptr %arr)
call void @llvm.lifetime.start.p0(i64 8, ptr %__range1)
store ptr %arr, ptr %__range1
call void @llvm.lifetime.start.p0(i64 8, ptr %__begin1)
%0 = load ptr, ptr %__range1
%call = call ptr @_ZNSt5arrayIiLm6EE5beginEv(ptr %0)
store ptr %call, ptr %__begin1
call void @llvm.lifetime.start.p0(i64 8, ptr %__end1)
%1 = load ptr, ptr %__range1
%call1 = call ptr @_ZNSt5arrayIiLm6EE3endEv(ptr %1)
store ptr %call1, ptr %__end1
br label %for.cond
for.cond:
%2 = load ptr, ptr %__begin1
%3 = load ptr, ptr %__end1
%cmp = icmp ne ptr %2, %3
br i1 %cmp, label %for.body, label %for.cond.cleanup
for.cond.cleanup:
call void @llvm.lifetime.end.p0(i64 8, ptr %__end1)
call void @llvm.lifetime.end.p0(i64 8, ptr %__begin1)
call void @llvm.lifetime.end.p0(i64 8, ptr %__range1)
br label %for.end
for.body:
call void @llvm.lifetime.start.p0(i64 8, ptr %elt)
%4 = load ptr, ptr %__begin1
store ptr %4, ptr %elt
%5 = load i32, ptr %cnt.addr
%inc = add nsw i32 %5, 1
store i32 %inc, ptr %cnt.addr
%6 = load ptr, ptr %elt
store i32 %inc, ptr %6
call void @llvm.lifetime.end.p0(i64 8, ptr %elt)
br label %for.inc
for.inc:
%7 = load ptr, ptr %__begin1
%incdec.ptr = getelementptr inbounds i32, ptr %7, i32 1
store ptr %incdec.ptr, ptr %__begin1
br label %for.cond
for.end:
call void @llvm.lifetime.start.p0(i64 8, ptr %__range12)
store ptr %arr, ptr %__range12
call void @llvm.lifetime.start.p0(i64 8, ptr %__begin13)
%8 = load ptr, ptr %__range12
%call4 = call ptr @_ZNSt5arrayIiLm6EE5beginEv(ptr %8)
store ptr %call4, ptr %__begin13
call void @llvm.lifetime.start.p0(i64 8, ptr %__end15)
%9 = load ptr, ptr %__range12
%call6 = call ptr @_ZNSt5arrayIiLm6EE3endEv(ptr %9)
store ptr %call6, ptr %__end15
br label %for.cond7
for.cond7:
%10 = load ptr, ptr %__begin13
%11 = load ptr, ptr %__end15
%cmp8 = icmp ne ptr %10, %11
br i1 %cmp8, label %for.body10, label %for.cond.cleanup9
for.cond.cleanup9:
call void @llvm.lifetime.end.p0(i64 8, ptr %__end15)
call void @llvm.lifetime.end.p0(i64 8, ptr %__begin13)
call void @llvm.lifetime.end.p0(i64 8, ptr %__range12)
br label %for.end14
for.body10:
call void @llvm.lifetime.start.p0(i64 8, ptr %elt11)
%12 = load ptr, ptr %__begin13
store ptr %12, ptr %elt11
%13 = load ptr, ptr %elt11
%14 = load i32, ptr %13
call void @_Z3usei(i32 %14)
call void @llvm.lifetime.end.p0(i64 8, ptr %elt11)
br label %for.inc12
for.inc12:
%15 = load ptr, ptr %__begin13
%incdec.ptr13 = getelementptr inbounds i32, ptr %15, i32 1
store ptr %incdec.ptr13, ptr %__begin13
br label %for.cond7
for.end14:
call void @llvm.lifetime.end.p0(i64 24, ptr %arr)
ret void
}
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
define linkonce_odr dso_local ptr @_ZNSt5arrayIiLm6EE5beginEv(ptr %this) {
entry:
%this.addr = alloca ptr
store ptr %this, ptr %this.addr
%this1 = load ptr, ptr %this.addr
%call = call ptr @_ZNSt5arrayIiLm6EE4dataEv(ptr %this1)
ret ptr %call
}
define linkonce_odr dso_local ptr @_ZNSt5arrayIiLm6EE3endEv(ptr %this) {
entry:
%this.addr = alloca ptr
store ptr %this, ptr %this.addr
%this1 = load ptr, ptr %this.addr
%call = call ptr @_ZNSt5arrayIiLm6EE4dataEv(ptr %this1)
%add.ptr = getelementptr inbounds i32, ptr %call, i64 6
ret ptr %add.ptr
}
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
declare dso_local void @_Z3usei(i32)
define linkonce_odr dso_local ptr @_ZNSt5arrayIiLm6EE4dataEv(ptr %this) {
entry:
%this.addr = alloca ptr
store ptr %this, ptr %this.addr
%this1 = load ptr, ptr %this.addr
%call = call ptr @_ZNSt14__array_traitsIiLm6EE6_S_ptrERA6_Ki(ptr nonnull align 4 dereferenceable(24) %this1)
ret ptr %call
}
define linkonce_odr dso_local ptr @_ZNSt14__array_traitsIiLm6EE6_S_ptrERA6_Ki(ptr nonnull align 4 dereferenceable(24) %__t) {
entry:
%__t.addr = alloca ptr
store ptr %__t, ptr %__t.addr
%0 = load ptr, ptr %__t.addr
ret ptr %0
}
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