llvm/test/Analysis/DependenceAnalysis/weak-zero-siv-large-btc.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6
; RUN: opt < %s -disable-output "-passes=print<da>" 2>&1 \
; RUN:     | FileCheck %s --check-prefixes=CHECK,CHECK-ALL
; RUN: opt < %s -disable-output "-passes=print<da>" -da-enable-dependence-test=weak-zero-siv 2>&1 \
; RUN:     | FileCheck %s --check-prefixes=CHECK,CHECK-WEAK-ZERO-SRC-SIV
;
; for (i = INT64_MIN + 1; i != INT64_MAX; i++) {
;   if (i == 0)
;     A[i] = 0;
;   A[0] = 1;
; }
;
; `A[i] = 0` will be executed (when i == 0), so there is a dependency between
; the two stores.
;
define void @weak_zero_src_siv_large_btc(ptr %A) {
; CHECK-ALL-LABEL: 'weak_zero_src_siv_large_btc'
; CHECK-ALL-NEXT:  Src: store i8 0, ptr %gep, align 1 --> Dst: store i8 0, ptr %gep, align 1
; CHECK-ALL-NEXT:    da analyze - none!
; CHECK-ALL-NEXT:  Src: store i8 0, ptr %gep, align 1 --> Dst: store i8 1, ptr %A, align 1
; CHECK-ALL-NEXT:    da analyze - output [*|<]!
; CHECK-ALL-NEXT:  Src: store i8 1, ptr %A, align 1 --> Dst: store i8 1, ptr %A, align 1
; CHECK-ALL-NEXT:    da analyze - output [S]!
;
; CHECK-WEAK-ZERO-SRC-SIV-LABEL: 'weak_zero_src_siv_large_btc'
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:  Src: store i8 0, ptr %gep, align 1 --> Dst: store i8 0, ptr %gep, align 1
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:    da analyze - output [*]!
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:  Src: store i8 0, ptr %gep, align 1 --> Dst: store i8 1, ptr %A, align 1
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:    da analyze - output [*|<]!
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:  Src: store i8 1, ptr %A, align 1 --> Dst: store i8 1, ptr %A, align 1
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:    da analyze - output [S]!
;
entry:
  br label %loop.header

loop.header:
  %i = phi i64 [ -9223372036854775807, %entry ], [ %i.inc, %loop.latch ]
  %cond = icmp eq i64 %i, 0
  br i1 %cond, label %if.then, label %loop.latch

if.then:
  %gep = getelementptr i8, ptr %A, i64 %i
  store i8 0, ptr %gep
  br label %loop.latch

loop.latch:
  store i8 1, ptr %A
  %i.inc = add i64 %i, 1
  %ec = icmp eq i64 %i.inc, 9223372036854775807
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}

;
; for (i = INT64_MIN + 1; i != INT64_MAX; i++) {
;   A[0] = 1;
;   if (i == 0)
;     A[i] = 0;
; }
;
; `A[i] = 0` will be executed (when i == 0), so there is a dependency between
; the two stores.
;
define void @weak_zero_dst_siv_large_btc(ptr %A) {
; CHECK-ALL-LABEL: 'weak_zero_dst_siv_large_btc'
; CHECK-ALL-NEXT:  Src: store i8 1, ptr %A, align 1 --> Dst: store i8 1, ptr %A, align 1
; CHECK-ALL-NEXT:    da analyze - output [S]!
; CHECK-ALL-NEXT:  Src: store i8 1, ptr %A, align 1 --> Dst: store i8 0, ptr %gep, align 1
; CHECK-ALL-NEXT:    da analyze - output [*|<]!
; CHECK-ALL-NEXT:  Src: store i8 0, ptr %gep, align 1 --> Dst: store i8 0, ptr %gep, align 1
; CHECK-ALL-NEXT:    da analyze - none!
;
; CHECK-WEAK-ZERO-SRC-SIV-LABEL: 'weak_zero_dst_siv_large_btc'
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:  Src: store i8 1, ptr %A, align 1 --> Dst: store i8 1, ptr %A, align 1
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:    da analyze - output [S]!
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:  Src: store i8 1, ptr %A, align 1 --> Dst: store i8 0, ptr %gep, align 1
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:    da analyze - output [*|<]!
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:  Src: store i8 0, ptr %gep, align 1 --> Dst: store i8 0, ptr %gep, align 1
; CHECK-WEAK-ZERO-SRC-SIV-NEXT:    da analyze - output [*]!
;
entry:
  br label %loop.header

loop.header:
  %i = phi i64 [ -9223372036854775807, %entry ], [ %i.inc, %loop.latch ]
  store i8 1, ptr %A
  %cond = icmp eq i64 %i, 0
  br i1 %cond, label %if.then, label %loop.latch

if.then:
  %gep = getelementptr i8, ptr %A, i64 %i
  store i8 0, ptr %gep
  br label %loop.latch

loop.latch:
  %i.inc = add i64 %i, 1
  %ec = icmp eq i64 %i.inc, 9223372036854775807
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}
;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
; CHECK: {{.*}}