mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
66 lines
1.6 KiB
LLVM
66 lines
1.6 KiB
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
|
|
|
|
; Test that a switch going to a switch on the same value can be merged.
|
|
; All three switches in this example can be merged into one big one.
|
|
|
|
declare void @foo1()
|
|
|
|
declare void @foo2()
|
|
|
|
declare void @foo3()
|
|
|
|
declare void @foo4()
|
|
|
|
define void @test1(i32 %V) {
|
|
switch i32 %V, label %F [
|
|
i32 4, label %T
|
|
i32 17, label %T
|
|
i32 5, label %T
|
|
i32 1234, label %F
|
|
]
|
|
T: ; preds = %0, %0, %0
|
|
switch i32 %V, label %F [
|
|
i32 4, label %A
|
|
i32 17, label %B
|
|
i32 42, label %C
|
|
]
|
|
A: ; preds = %T
|
|
call void @foo1( )
|
|
ret void
|
|
B: ; preds = %F, %F, %T
|
|
call void @foo2( )
|
|
ret void
|
|
C: ; preds = %T
|
|
call void @foo3( )
|
|
ret void
|
|
F: ; preds = %F, %T, %0, %0
|
|
switch i32 %V, label %F [
|
|
i32 4, label %B
|
|
i32 18, label %B
|
|
i32 42, label %D
|
|
]
|
|
D: ; preds = %F
|
|
call void @foo4( )
|
|
ret void
|
|
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: switch i32 %V, label %infloop [
|
|
; CHECK-NEXT: i32 4, label %A
|
|
; CHECK-NEXT: i32 17, label %B
|
|
; CHECK-NEXT: i32 18, label %B
|
|
; CHECK-NEXT: i32 42, label %D
|
|
; CHECK-NEXT: ]
|
|
; CHECK: A:
|
|
; CHECK-NEXT: call void @foo1()
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: B:
|
|
; CHECK-NEXT: call void @foo2()
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: D:
|
|
; CHECK-NEXT: call void @foo4()
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: infloop:
|
|
; CHECK-NEXT: br label %infloop
|
|
}
|
|
|