xref: /llvm-project/llvm/test/Analysis/ScalarEvolution/alloca.ll (revision 0d38f21e4ab7fe7cebe76a9d7c218ec54dba1e98)

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

define i64 @alloca_non_null() {
; CHECK-LABEL: 'alloca_non_null'
; CHECK-NEXT:  Classifying expressions for: @alloca_non_null
; CHECK-NEXT:    %alloca = alloca i32, align 4
; CHECK-NEXT:    --> %alloca U: [4,-7) S: [-9223372036854775808,9223372036854775805)
; CHECK-NEXT:    %int = ptrtoint ptr %alloca to i64
; CHECK-NEXT:    --> (ptrtoint ptr %alloca to i64) U: [4,-7) S: [-9223372036854775808,9223372036854775805)
; CHECK-NEXT:  Determining loop execution counts for: @alloca_non_null
;
  %alloca = alloca i32, align 4
  %int = ptrtoint ptr %alloca to i64
  ret i64 %int
}

define i64 @alloca_maybe_null() {
; CHECK-LABEL: 'alloca_maybe_null'
; CHECK-NEXT:  Classifying expressions for: @alloca_maybe_null
; CHECK-NEXT:    %alloca = alloca i32, align 4, addrspace(1)
; CHECK-NEXT:    --> %alloca U: [0,-7) S: [-9223372036854775808,9223372036854775805)
; CHECK-NEXT:    %int = ptrtoint ptr addrspace(1) %alloca to i64
; CHECK-NEXT:    --> (ptrtoint ptr addrspace(1) %alloca to i64) U: [0,-7) S: [-9223372036854775808,9223372036854775805)
; CHECK-NEXT:  Determining loop execution counts for: @alloca_maybe_null
;
  %alloca = alloca i32, align 4, addrspace(1)
  %int = ptrtoint ptr addrspace(1) %alloca to i64
  ret i64 %int
}

define void @alloca_icmp_null_exit_count() {
; CHECK-LABEL: 'alloca_icmp_null_exit_count'
; CHECK-NEXT:  Classifying expressions for: @alloca_icmp_null_exit_count
; CHECK-NEXT:    %alloca = alloca [3 x i32], align 4
; CHECK-NEXT:    --> %alloca U: [4,-15) S: [-9223372036854775808,9223372036854775805)
; CHECK-NEXT:    %alloca.end = getelementptr inbounds i32, ptr %alloca, i64 3
; CHECK-NEXT:    --> (12 + %alloca)<nuw> U: [16,-3) S: [-9223372036854775808,9223372036854775805)
; CHECK-NEXT:    %ptr = phi ptr [ %ptr.next, %loop ], [ %alloca, %entry ]
; CHECK-NEXT:    --> {%alloca,+,4}<nuw><%loop> U: [4,-7) S: [-9223372036854775808,9223372036854775805) Exits: (8 + %alloca)<nuw> LoopDispositions: { %loop: Computable }
; CHECK-NEXT:    %ptr.next = getelementptr i32, ptr %ptr, i64 1
; CHECK-NEXT:    --> {(4 + %alloca)<nuw>,+,4}<nuw><%loop> U: [8,-3) S: [-9223372036854775808,9223372036854775805) Exits: (12 + %alloca)<nuw> LoopDispositions: { %loop: Computable }
; CHECK-NEXT:    %and = and i1 %cmp1, %cmp2
; CHECK-NEXT:    --> (%cmp2 umin %cmp1) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT:  Determining loop execution counts for: @alloca_icmp_null_exit_count
; CHECK-NEXT:  Loop %loop: backedge-taken count is i64 2
; CHECK-NEXT:  Loop %loop: constant max backedge-taken count is i64 2
; CHECK-NEXT:  Loop %loop: symbolic max backedge-taken count is i64 2
; CHECK-NEXT:  Loop %loop: Trip multiple is 3
;
entry:
  %alloca = alloca [3 x i32], align 4
  %alloca.end = getelementptr inbounds i32, ptr %alloca, i64 3
  br label %loop

loop:
  %ptr = phi ptr [ %ptr.next, %loop ], [ %alloca, %entry ]
  %ptr.next = getelementptr i32, ptr %ptr, i64 1
  %cmp1 = icmp ne ptr %ptr.next, %alloca.end
  %cmp2 = icmp ne ptr %ptr.next, null
  %and = and i1 %cmp1, %cmp2
  br i1 %and, label %loop, label %exit

exit:
  ret void
}