test/Transforms/IROutliner/exit-block-phi-node-value-attribution.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs
; RUN: opt -S -verify -iroutliner -ir-outlining-no-cost < %s | FileCheck %s

; Make sure that each outlined region only analyzes on the incoming values in exit
; block phi nodes that come from the outlined region.  Without this, more incoming
; values from the phi node would be considered if the incoming value is
; included in the outlined region. This is particularly likely to happen for
; constants.

define void @f1() {
bb1:
  %0 = add i32 1, 2
  %1 = add i32 3, 4
  %2 = add i32 5, 6
  %3 = add i32 7, 8
  br label %bb5
bb2:
  %4 = mul i32 5, 4
  br label %bb5
placeholder:
  %a = sub i32 5, 4
  br label %bb5
bb3:
  %5 = add i32 1, 2
  %6 = add i32 3, 4
  %7 = add i32 5, 6
  %8 = add i32 7, 8
  br label %bb5
bb4:
  %9 = mul i32 5, 4
  br label %bb5

placeholder1:
  %b = add i32 5, 4
  ret void

bb5:
  %phinode = phi i32 [5, %placeholder], [5, %bb1], [5, %bb2], [4, %bb3], [4, %bb4]
  ret void
}
; CHECK-LABEL: @f1(
; CHECK-NEXT:  bb1:
; CHECK-NEXT:    [[PHINODE_CE_LOC1:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[PHINODE_CE_LOC:%.*]] = alloca i32, align 4
; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 -1, ptr [[PHINODE_CE_LOC]])
; CHECK-NEXT:    call void @outlined_ir_func_0(ptr [[PHINODE_CE_LOC]], i32 0)
; CHECK-NEXT:    [[PHINODE_CE_RELOAD:%.*]] = load i32, ptr [[PHINODE_CE_LOC]], align 4
; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 -1, ptr [[PHINODE_CE_LOC]])
; CHECK-NEXT:    br label [[BB5:%.*]]
; CHECK:       placeholder:
; CHECK-NEXT:    [[A:%.*]] = sub i32 5, 4
; CHECK-NEXT:    br label [[BB5]]
; CHECK:       bb3:
; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 -1, ptr [[PHINODE_CE_LOC1]])
; CHECK-NEXT:    call void @outlined_ir_func_0(ptr [[PHINODE_CE_LOC1]], i32 1)
; CHECK-NEXT:    [[PHINODE_CE_RELOAD2:%.*]] = load i32, ptr [[PHINODE_CE_LOC1]], align 4
; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 -1, ptr [[PHINODE_CE_LOC1]])
; CHECK-NEXT:    br label [[BB5]]
; CHECK:       placeholder1:
; CHECK-NEXT:    [[B:%.*]] = add i32 5, 4
; CHECK-NEXT:    ret void
; CHECK:       bb5:
; CHECK-NEXT:    [[PHINODE:%.*]] = phi i32 [ 5, [[PLACEHOLDER:%.*]] ], [ [[PHINODE_CE_RELOAD]], [[BB1:%.*]] ], [ [[PHINODE_CE_RELOAD2]], [[BB3:%.*]] ]
; CHECK-NEXT:    ret void
;
;
; CHECK-LABEL: define internal void @outlined_ir_func_0(
; CHECK-NEXT:  newFuncRoot:
; CHECK-NEXT:    br label [[BB1_TO_OUTLINE:%.*]]
; CHECK:       bb1_to_outline:
; CHECK-NEXT:    [[TMP2:%.*]] = add i32 1, 2
; CHECK-NEXT:    [[TMP3:%.*]] = add i32 3, 4
; CHECK-NEXT:    [[TMP4:%.*]] = add i32 5, 6
; CHECK-NEXT:    [[TMP5:%.*]] = add i32 7, 8
; CHECK-NEXT:    br label [[BB5_SPLIT:%.*]]
; CHECK:       bb2:
; CHECK-NEXT:    [[TMP6:%.*]] = mul i32 5, 4
; CHECK-NEXT:    br label [[BB5_SPLIT]]
; CHECK:       bb5.split:
; CHECK-NEXT:    [[TMP7:%.*]] = phi i32 [ 4, [[BB1_TO_OUTLINE]] ], [ 4, [[BB2:%.*]] ]
; CHECK-NEXT:    [[PHINODE_CE:%.*]] = phi i32 [ 5, [[BB1_TO_OUTLINE]] ], [ 5, [[BB2]] ]
; CHECK-NEXT:    br label [[BB5_EXITSTUB:%.*]]
; CHECK:       bb5.exitStub:
; CHECK-NEXT:    switch i32 [[TMP1:%.*]], label [[FINAL_BLOCK_0:%.*]] [
; CHECK-NEXT:    i32 0, label [[OUTPUT_BLOCK_0_0:%.*]]
; CHECK-NEXT:    i32 1, label [[OUTPUT_BLOCK_1_0:%.*]]
; CHECK-NEXT:    ]
; CHECK:       output_block_0_0:
; CHECK-NEXT:    store i32 [[PHINODE_CE]], ptr [[TMP0:%.*]], align 4
; CHECK-NEXT:    br label [[FINAL_BLOCK_0]]
; CHECK:       output_block_1_0:
; CHECK-NEXT:    store i32 [[TMP7]], ptr [[TMP0]], align 4
; CHECK-NEXT:    br label [[FINAL_BLOCK_0]]
; CHECK:       final_block_0:
; CHECK-NEXT:    ret void
;