; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S -o - < %s | FileCheck %s
declare void @func2(i32)
declare void @func4(i32)
declare void @func6(i32)
declare void @func8(i32)
;; test1 - create a switch with case 2 and case 4 from two branches: N == 2
;; and N == 4.
define void @test1(i32 %N) nounwind uwtable {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[N:%.*]], label [[IF_ELSE8:%.*]] [
; CHECK-NEXT: i32 2, label [[IF_THEN:%.*]]
; CHECK-NEXT: i32 4, label [[IF_THEN7:%.*]]
; CHECK-NEXT: ], !prof [[PROF0:![0-9]+]]
; CHECK: if.then:
; CHECK-NEXT: call void @func2(i32 [[N]]) #[[ATTR1:[0-9]+]]
; CHECK-NEXT: br label [[IF_END9:%.*]]
; CHECK: if.then7:
; CHECK-NEXT: call void @func4(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[IF_END9]]
; CHECK: if.else8:
; CHECK-NEXT: call void @func8(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[IF_END9]]
; CHECK: if.end9:
; CHECK-NEXT: ret void
;
entry:
%cmp = icmp eq i32 %N, 2
br i1 %cmp, label %if.then, label %if.else, !prof !0
if.then:
call void @func2(i32 %N) nounwind
br label %if.end9
if.else:
%cmp2 = icmp eq i32 %N, 4
br i1 %cmp2, label %if.then7, label %if.else8, !prof !1
if.then7:
call void @func4(i32 %N) nounwind
br label %if.end
if.else8:
call void @func8(i32 %N) nounwind
br label %if.end
if.end:
br label %if.end9
if.end9:
ret void
}
;; test2 - Merge two switches where PredDefault == BB.
define void @test2(i32 %M, i32 %N) nounwind uwtable {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[M:%.*]], 2
; CHECK-NEXT: br i1 [[CMP]], label [[SW1:%.*]], label [[SW2:%.*]]
; CHECK: sw1:
; CHECK-NEXT: switch i32 [[N:%.*]], label [[SW_EPILOG:%.*]] [
; CHECK-NEXT: i32 2, label [[SW_BB:%.*]]
; CHECK-NEXT: i32 3, label [[SW_BB1:%.*]]
; CHECK-NEXT: i32 4, label [[SW_BB5:%.*]]
; CHECK-NEXT: ], !prof [[PROF1:![0-9]+]]
; CHECK: sw.bb:
; CHECK-NEXT: call void @func2(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw.bb1:
; CHECK-NEXT: call void @func4(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw2:
; CHECK-NEXT: switch i32 [[N]], label [[SW_EPILOG]] [
; CHECK-NEXT: i32 2, label [[SW_BB4:%.*]]
; CHECK-NEXT: i32 4, label [[SW_BB5]]
; CHECK-NEXT: ], !prof [[PROF2:![0-9]+]]
; CHECK: sw.bb4:
; CHECK-NEXT: call void @func6(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw.bb5:
; CHECK-NEXT: call void @func8(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw.epilog:
; CHECK-NEXT: ret void
;
entry:
%cmp = icmp sgt i32 %M, 2
br i1 %cmp, label %sw1, label %sw2
sw1:
switch i32 %N, label %sw2 [
i32 2, label %sw.bb
i32 3, label %sw.bb1
], !prof !2
sw.bb:
call void @func2(i32 %N) nounwind
br label %sw.epilog
sw.bb1:
call void @func4(i32 %N) nounwind
br label %sw.epilog
sw2:
;; Here "case 2" is invalidated if control is transferred through default case
;; of the first switch.
switch i32 %N, label %sw.epilog [
i32 2, label %sw.bb4
i32 4, label %sw.bb5
], !prof !3
sw.bb4:
call void @func6(i32 %N) nounwind
br label %sw.epilog
sw.bb5:
call void @func8(i32 %N) nounwind
br label %sw.epilog
sw.epilog:
ret void
}
;; test3 - Merge two switches where PredDefault != BB.
define void @test3(i32 %M, i32 %N) nounwind uwtable {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[M:%.*]], 2
; CHECK-NEXT: br i1 [[CMP]], label [[SW1:%.*]], label [[SW2:%.*]]
; CHECK: sw1:
; CHECK-NEXT: switch i32 [[N:%.*]], label [[SW_BB:%.*]] [
; CHECK-NEXT: i32 1, label [[SW_BB1:%.*]]
; CHECK-NEXT: i32 3, label [[SW_BB4:%.*]]
; CHECK-NEXT: i32 2, label [[SW_EPILOG:%.*]]
; CHECK-NEXT: ], !prof [[PROF3:![0-9]+]]
; CHECK: sw.bb:
; CHECK-NEXT: call void @func2(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw.bb1:
; CHECK-NEXT: call void @func4(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw2:
; CHECK-NEXT: switch i32 [[N]], label [[SW_EPILOG]] [
; CHECK-NEXT: i32 3, label [[SW_BB4]]
; CHECK-NEXT: i32 4, label [[SW_BB5:%.*]]
; CHECK-NEXT: ], !prof [[PROF4:![0-9]+]]
; CHECK: sw.bb4:
; CHECK-NEXT: call void @func6(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw.bb5:
; CHECK-NEXT: call void @func8(i32 [[N]]) #[[ATTR1]]
; CHECK-NEXT: br label [[SW_EPILOG]]
; CHECK: sw.epilog:
; CHECK-NEXT: ret void
;
entry:
%cmp = icmp sgt i32 %M, 2
br i1 %cmp, label %sw1, label %sw2
sw1:
switch i32 %N, label %sw.bb [
i32 2, label %sw2
i32 3, label %sw2
i32 1, label %sw.bb1
], !prof !4
sw.bb:
call void @func2(i32 %N) nounwind
br label %sw.epilog
sw.bb1:
call void @func4(i32 %N) nounwind
br label %sw.epilog
sw2:
switch i32 %N, label %sw.epilog [
i32 3, label %sw.bb4
i32 4, label %sw.bb5
], !prof !5
sw.bb4:
call void @func6(i32 %N) nounwind
br label %sw.epilog
sw.bb5:
call void @func8(i32 %N) nounwind
br label %sw.epilog
sw.epilog:
ret void
}
!0 = !{!"branch_weights", i32 64, i32 4}
!1 = !{!"branch_weights", i32 4, i32 64}
; CHECK: !0 = !{!"branch_weights", i32 256, i32 4352, i32 16}
!2 = !{!"branch_weights", i32 4, i32 4, i32 8}
!3 = !{!"branch_weights", i32 8, i32 8, i32 4}
; CHECK: !1 = !{!"branch_weights", i32 32, i32 48, i32 96, i32 16}
!4 = !{!"branch_weights", i32 7, i32 6, i32 4, i32 3}
!5 = !{!"branch_weights", i32 17, i32 13, i32 9}
; CHECK: !3 = !{!"branch_weights", i32 7, i32 3, i32 4, i32 6}
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