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llvm/llvm/test/Transforms/GVN/opaque-ptr.ll 

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=gvn < %s | FileCheck %s

declare void @use(ptr)
declare void @use.i32(i32)

define void @gep_cse(ptr %p) {
; CHECK-LABEL: @gep_cse(
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 1
; CHECK-NEXT:    [[GEP3:%.*]] = getelementptr i64, ptr [[P]], i64 1
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    call void @use(ptr [[GEP3]])
; CHECK-NEXT:    ret void
;
  %gep1 = getelementptr i32, ptr %p, i64 1
  %gep2 = getelementptr i32, ptr %p, i64 1
  %gep3 = getelementptr i64, ptr %p, i64 1
  call void @use(ptr %gep1)
  call void @use(ptr %gep2)
  call void @use(ptr %gep3)
  ret void
}

define void @gep_cse_offset_canonicalization(ptr %p, i64 %idx, i64 %idx2) {
; CHECK-LABEL: @gep_cse_offset_canonicalization(
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr i64, ptr [[P:%.*]], i64 1
; CHECK-NEXT:    [[GEP1_DIFFERENT:%.*]] = getelementptr i8, ptr [[P]], i64 12
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    call void @use(ptr [[GEP1]])
; CHECK-NEXT:    call void @use(ptr [[GEP1_DIFFERENT]])
; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr i64, ptr [[P]], i64 [[IDX:%.*]]
; CHECK-NEXT:    [[GEP2_DIFFERENT:%.*]] = getelementptr { i32, i32, i32 }, ptr [[P]], i64 [[IDX]]
; CHECK-NEXT:    call void @use(ptr [[GEP2]])
; CHECK-NEXT:    call void @use(ptr [[GEP2]])
; CHECK-NEXT:    call void @use(ptr [[GEP2_DIFFERENT]])
; CHECK-NEXT:    [[GEP3:%.*]] = getelementptr { [0 x i32], [0 x i32] }, ptr [[P]], i64 0, i32 0, i64 [[IDX]]
; CHECK-NEXT:    [[GEP3_DIFFERENT:%.*]] = getelementptr { [0 x i32], [0 x i32] }, ptr [[P]], i64 0, i32 0, i64 [[IDX2:%.*]]
; CHECK-NEXT:    call void @use(ptr [[GEP3]])
; CHECK-NEXT:    call void @use(ptr [[GEP3]])
; CHECK-NEXT:    call void @use(ptr [[GEP3]])
; CHECK-NEXT:    call void @use(ptr [[GEP3_DIFFERENT]])
; CHECK-NEXT:    [[GEP4:%.*]] = getelementptr [4 x i32], ptr [[P]], i64 [[IDX]], i64 [[IDX2]]
; CHECK-NEXT:    [[GEP4_DIFFERENT:%.*]] = getelementptr [4 x float], ptr [[P]], i64 [[IDX2]], i64 [[IDX]]
; CHECK-NEXT:    call void @use(ptr [[GEP4]])
; CHECK-NEXT:    call void @use(ptr [[GEP4]])
; CHECK-NEXT:    call void @use(ptr [[GEP4_DIFFERENT]])
; CHECK-NEXT:    [[GEP5:%.*]] = getelementptr <vscale x 2 x i32>, ptr [[P]], i64 1
; CHECK-NEXT:    [[GEP5_SAME:%.*]] = getelementptr <vscale x 2 x float>, ptr [[P]], i64 1
; CHECK-NEXT:    [[GEP5_DIFFERENT:%.*]] = getelementptr <vscale x 2 x i64>, ptr [[P]], i64 1
; CHECK-NEXT:    call void @use(ptr [[GEP5]])
; CHECK-NEXT:    call void @use(ptr [[GEP5_SAME]])
; CHECK-NEXT:    call void @use(ptr [[GEP5_DIFFERENT]])
; CHECK-NEXT:    [[GEP6:%.*]] = getelementptr [4 x <vscale x 4 x i32>], ptr [[P]], i64 [[IDX]], i64 1
; CHECK-NEXT:    [[GEP6_SAME:%.*]] = getelementptr [4 x <vscale x 4 x float>], ptr [[P]], i64 [[IDX]], i64 1
; CHECK-NEXT:    [[GEP6_DIFFERENT:%.*]] = getelementptr [4 x <vscale x 4 x float>], ptr [[P]], i64 [[IDX2]], i64 1
; CHECK-NEXT:    call void @use(ptr [[GEP6]])
; CHECK-NEXT:    call void @use(ptr [[GEP6_SAME]])
; CHECK-NEXT:    call void @use(ptr [[GEP6_DIFFERENT]])
; CHECK-NEXT:    ret void
;
  %gep1 = getelementptr i64, ptr %p, i64 1
  %gep1.same1 = getelementptr i32, ptr %p, i64 2
  %gep1.same2 = getelementptr i8, ptr %p, i64 8
  %gep1.different = getelementptr i8, ptr %p, i64 12
  call void @use(ptr %gep1)
  call void @use(ptr %gep1.same1)
  call void @use(ptr %gep1.same2)
  call void @use(ptr %gep1.different)
  %gep2 = getelementptr i64, ptr %p, i64 %idx
  %gep2.same = getelementptr { i32, i32 }, ptr %p, i64 %idx
  %gep2.different = getelementptr { i32, i32, i32 }, ptr %p, i64 %idx
  call void @use(ptr %gep2)
  call void @use(ptr %gep2.same)
  call void @use(ptr %gep2.different)
  %gep3 = getelementptr { [0 x i32], [0 x i32] }, ptr %p, i64 0, i32 0, i64 %idx
  %gep3.same1 = getelementptr { [0 x i32], [0 x i32] }, ptr %p, i64 0, i32 1, i64 %idx
  %gep3.same2 = getelementptr { [0 x i32], [0 x i32] }, ptr %p, i64 1, i32 0, i64 %idx
  %gep3.different = getelementptr { [0 x i32], [0 x i32] }, ptr %p, i64 0, i32 0, i64 %idx2
  call void @use(ptr %gep3)
  call void @use(ptr %gep3.same1)
  call void @use(ptr %gep3.same2)
  call void @use(ptr %gep3.different)
  %gep4 = getelementptr [4 x i32], ptr %p, i64 %idx, i64 %idx2
  %gep4.same = getelementptr [4 x float], ptr %p, i64 %idx, i64 %idx2
  %gep4.different = getelementptr [4 x float], ptr %p, i64 %idx2, i64 %idx
  call void @use(ptr %gep4)
  call void @use(ptr %gep4.same)
  call void @use(ptr %gep4.different)
  ; TODO: %gep5 and %gep5.same are equivalent as well.
  %gep5 = getelementptr <vscale x 2 x i32>, ptr %p, i64 1
  %gep5.same = getelementptr <vscale x 2 x float>, ptr %p, i64 1
  %gep5.different = getelementptr <vscale x 2 x i64>, ptr %p, i64 1
  call void @use(ptr %gep5)
  call void @use(ptr %gep5.same)
  call void @use(ptr %gep5.different)
  %gep6 = getelementptr [4 x <vscale x 4 x i32>], ptr %p, i64 %idx, i64 1
  %gep6.same = getelementptr [4 x <vscale x 4 x float>], ptr %p, i64 %idx, i64 1
  %gep6.different = getelementptr [4 x <vscale x 4 x float>], ptr %p, i64 %idx2, i64 1
  call void @use(ptr %gep6)
  call void @use(ptr %gep6.same)
  call void @use(ptr %gep6.different)
  ret void
}

define i32 @phi_trans(i1 %c, ptr %p1, ptr %p2) {
; CHECK-LABEL: @phi_trans(
; CHECK-NEXT:    br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
; CHECK:       if:
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr i32, ptr [[P1:%.*]], i64 1
; CHECK-NEXT:    [[V1:%.*]] = load i32, ptr [[GEP1]], align 4
; CHECK-NEXT:    call void @use(i32 [[V1]]) #[[ATTR0:[0-9]+]]
; CHECK-NEXT:    br label [[JOIN:%.*]]
; CHECK:       else:
; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr i32, ptr [[P2:%.*]], i64 1
; CHECK-NEXT:    [[V2:%.*]] = load i32, ptr [[GEP2]], align 4
; CHECK-NEXT:    call void @use(i32 [[V2]]) #[[ATTR0]]
; CHECK-NEXT:    br label [[JOIN]]
; CHECK:       join:
; CHECK-NEXT:    [[V:%.*]] = phi i32 [ [[V1]], [[IF]] ], [ [[V2]], [[ELSE]] ]
; CHECK-NEXT:    [[PHI:%.*]] = phi ptr [ [[P1]], [[IF]] ], [ [[P2]], [[ELSE]] ]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[PHI]], i64 1
; CHECK-NEXT:    ret i32 [[V]]
;
  br i1 %c, label %if, label %else

if:
  %gep1 = getelementptr i32, ptr %p1, i64 1
  %v1 = load i32, ptr %gep1
  call void @use(i32 %v1) readnone
  br label %join

else:
  %gep2 = getelementptr i32, ptr %p2, i64 1
  %v2 = load i32, ptr %gep2
  call void @use(i32 %v2) readnone
  br label %join

join:
  %phi = phi ptr [ %p1, %if ], [ %p2, %else ]
  %gep = getelementptr i32, ptr %phi, i64 1
  %v = load i32, ptr %gep
  ret i32 %v
}

define i32 @phi_trans_different_types(i1 %c, ptr %p1, ptr %p2) {
; CHECK-LABEL: @phi_trans_different_types(
; CHECK-NEXT:    br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
; CHECK:       if:
; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr i32, ptr [[P1:%.*]], i64 1
; CHECK-NEXT:    [[V1:%.*]] = load i32, ptr [[GEP1]], align 4
; CHECK-NEXT:    call void @use.i32(i32 [[V1]]) #[[ATTR0]]
; CHECK-NEXT:    br label [[JOIN:%.*]]
; CHECK:       else:
; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr i64, ptr [[P2:%.*]], i64 1
; CHECK-NEXT:    [[V2:%.*]] = load i32, ptr [[GEP2]], align 4
; CHECK-NEXT:    call void @use.i32(i32 [[V2]]) #[[ATTR0]]
; CHECK-NEXT:    [[GEP_PHI_TRANS_INSERT:%.*]] = getelementptr i32, ptr [[P2]], i64 1
; CHECK-NEXT:    [[V_PRE:%.*]] = load i32, ptr [[GEP_PHI_TRANS_INSERT]], align 4
; CHECK-NEXT:    br label [[JOIN]]
; CHECK:       join:
; CHECK-NEXT:    [[V:%.*]] = phi i32 [ [[V1]], [[IF]] ], [ [[V_PRE]], [[ELSE]] ]
; CHECK-NEXT:    [[PHI:%.*]] = phi ptr [ [[P1]], [[IF]] ], [ [[P2]], [[ELSE]] ]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[PHI]], i64 1
; CHECK-NEXT:    ret i32 [[V]]
;
  br i1 %c, label %if, label %else

if:
  %gep1 = getelementptr i32, ptr %p1, i64 1
  %v1 = load i32, ptr %gep1
  call void @use.i32(i32 %v1) readnone
  br label %join

else:
  %gep2 = getelementptr i64, ptr %p2, i64 1
  %v2 = load i32, ptr %gep2
  call void @use.i32(i32 %v2) readnone
  br label %join

join:
  %phi = phi ptr [ %p1, %if ], [ %p2, %else ]
  %gep = getelementptr i32, ptr %phi, i64 1
  %v = load i32, ptr %gep
  ret i32 %v
}

define i32 @select_pre(ptr %px, ptr %py) {
; CHECK-LABEL: @select_pre(
; CHECK-NEXT:    [[T2:%.*]] = load i32, ptr [[PY:%.*]], align 4
; CHECK-NEXT:    [[T3:%.*]] = load i32, ptr [[PX:%.*]], align 4
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[T2]], [[T3]]
; CHECK-NEXT:    [[TMP1:%.*]] = select i1 [[CMP]], i32 [[T3]], i32 [[T2]]
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[CMP]], ptr [[PX]], ptr [[PY]]
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %t2 = load i32, ptr %py, align 4
  %t3 = load i32, ptr %px, align 4
  %cmp = icmp slt i32 %t2, %t3
  %select = select i1 %cmp, ptr %px, ptr %py
  %r = load i32, ptr %select, align 4
  ret i32 %r
}

define i64 @select_pre_different_types(ptr %px, ptr %py) {
; CHECK-LABEL: @select_pre_different_types(
; CHECK-NEXT:    [[T2:%.*]] = load i32, ptr [[PY:%.*]], align 4
; CHECK-NEXT:    [[T3:%.*]] = load i32, ptr [[PX:%.*]], align 4
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[T2]], [[T3]]
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[CMP]], ptr [[PX]], ptr [[PY]]
; CHECK-NEXT:    [[R:%.*]] = load i64, ptr [[SELECT]], align 4
; CHECK-NEXT:    ret i64 [[R]]
;
  %t2 = load i32, ptr %py, align 4
  %t3 = load i32, ptr %px, align 4
  %cmp = icmp slt i32 %t2, %t3
  %select = select i1 %cmp, ptr %px, ptr %py
  %r = load i64, ptr %select, align 4
  ret i64 %r
}