llvm/test/Analysis/Delinearization/multidim_pointer_addrspace.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes='print<delinearization>' -disable-output 2>&1 | FileCheck %s

; The element-size SCEV is derived from the index type of the access's actual
; pointer operand. On a target whose data layout gives different pointer index
; widths per address space, an access through a narrow (32-bit) address space
; must not produce a 64-bit element size, otherwise delinearization would call
; SCEVDivision::divide with mismatched operand types and trip an assertion.
;
; Derived from the following code (with A in a 32-bit address space):
;
; void foo(int n, int m, double A[n][m]) {
;   for (int i = 0; i < n; i++)
;     for (int j = 0; j < m; j++)
;       A[i][j] = 1.0;
; }

; Address space 3 uses 32-bit pointers; the default address space uses 64-bit.
target datalayout = "e-p:64:64-p3:32:32-i64:64-n32:64"

define void @foo(i32 %n, i32 %m, ptr addrspace(3) %A) {
; CHECK-LABEL: 'foo'
; CHECK-NEXT:  Inst: %val = load double, ptr addrspace(3) %arrayidx, align 8
; CHECK-NEXT:  AccessFunction: {{\{\{}}0,+,(8 * %m)}<%for.i>,+,8}<%for.j>
; CHECK-NEXT:  Base offset: %A
; CHECK-NEXT:  ArrayDecl[UnknownSize][%m] with elements of 8 bytes.
; CHECK-NEXT:  ArrayRef[{0,+,1}<nuw><nsw><%for.i>][{0,+,1}<nuw><nsw><%for.j>]
; CHECK-NEXT:  Delinearization validation: Failed
; CHECK-EMPTY:
; CHECK-NEXT:  Inst: store double %val, ptr addrspace(3) %arrayidx, align 8
; CHECK-NEXT:  AccessFunction: {{\{\{}}0,+,(8 * %m)}<%for.i>,+,8}<%for.j>
; CHECK-NEXT:  Base offset: %A
; CHECK-NEXT:  ArrayDecl[UnknownSize][%m] with elements of 8 bytes.
; CHECK-NEXT:  ArrayRef[{0,+,1}<nuw><nsw><%for.i>][{0,+,1}<nuw><nsw><%for.j>]
; CHECK-NEXT:  Delinearization validation: Failed
;
entry:
  br label %for.i

for.i:
  %i = phi i32 [ 0, %entry ], [ %i.inc, %for.i.inc ]
  %tmp = mul nsw i32 %i, %m
  br label %for.j

for.j:
  %j = phi i32 [ 0, %for.i ], [ %j.inc, %for.j ]
  %sum = add i32 %j, %tmp
  %arrayidx = getelementptr inbounds double, ptr addrspace(3) %A, i32 %sum
  %val = load double, ptr addrspace(3) %arrayidx
  store double %val, ptr addrspace(3) %arrayidx
  %j.inc = add nsw i32 %j, 1
  %j.exitcond = icmp eq i32 %j.inc, %m
  br i1 %j.exitcond, label %for.i.inc, label %for.j

for.i.inc:
  %i.inc = add nsw i32 %i, 1
  %i.exitcond = icmp eq i32 %i.inc, %n
  br i1 %i.exitcond, label %end, label %for.i

end:
  ret void
}