mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-26 14:15:53 +00:00
a8a2b99aec
the default target of the first switch is not the basic block the second switch is in (PredDefault != BB). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163916 91177308-0d34-0410-b5e6-96231b3b80d8
141 lines
3.2 KiB
LLVM
141 lines
3.2 KiB
LLVM
; RUN: opt -simplifycfg -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 {
|
|
entry:
|
|
%cmp = icmp eq i32 %N, 2
|
|
br i1 %cmp, label %if.then, label %if.else, !prof !0
|
|
; CHECK: test1
|
|
; CHECK: switch i32 %N
|
|
; CHECK: ], !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 {
|
|
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
|
|
; CHECK: test2
|
|
; CHECK: switch i32 %N, label %sw.epilog
|
|
; CHECK: i32 2, label %sw.bb
|
|
; CHECK: i32 3, label %sw.bb1
|
|
; CHECK: i32 4, label %sw.bb5
|
|
; CHECK: ], !prof !1
|
|
|
|
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 {
|
|
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
|
|
; CHECK: test3
|
|
; CHECK: switch i32 %N, label %sw.bb
|
|
; CHECK: i32 1, label %sw.bb1
|
|
; CHECK: i32 3, label %sw.bb4
|
|
; CHECK: i32 2, label %sw.epilog
|
|
; CHECK: ], !prof !3
|
|
|
|
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 = metadata !{metadata !"branch_weights", i32 64, i32 4}
|
|
!1 = metadata !{metadata !"branch_weights", i32 4, i32 64}
|
|
; CHECK: !0 = metadata !{metadata !"branch_weights", i32 256, i32 4352, i32 16}
|
|
!2 = metadata !{metadata !"branch_weights", i32 4, i32 4, i32 8}
|
|
!3 = metadata !{metadata !"branch_weights", i32 8, i32 8, i32 4}
|
|
; CHECK: !1 = metadata !{metadata !"branch_weights", i32 32, i32 48, i32 96, i32 16}
|
|
!4 = metadata !{metadata !"branch_weights", i32 7, i32 6, i32 4, i32 3}
|
|
!5 = metadata !{metadata !"branch_weights", i32 17, i32 13, i32 9}
|
|
; CHECK: !3 = metadata !{metadata !"branch_weights", i32 7, i32 3, i32 4, i32 6}
|