mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-31 16:02:52 +01:00
82 lines
2.0 KiB
LLVM
82 lines
2.0 KiB
LLVM
; RUN: opt < %s -simplifycfg -S | FileCheck %s
|
|
|
|
; CHECK-NOT: switch
|
|
|
|
; Test normal folding
|
|
define i32 @test1() {
|
|
switch i32 5, label %Default [
|
|
i32 0, label %Foo
|
|
i32 1, label %Bar
|
|
i32 2, label %Baz
|
|
i32 5, label %TheDest
|
|
]
|
|
Default: ; preds = %0
|
|
ret i32 -1
|
|
Foo: ; preds = %0
|
|
ret i32 -2
|
|
Bar: ; preds = %0
|
|
ret i32 -3
|
|
Baz: ; preds = %0
|
|
ret i32 -4
|
|
TheDest: ; preds = %0
|
|
ret i32 1234
|
|
}
|
|
|
|
; Test folding to default dest
|
|
define i32 @test2() {
|
|
switch i32 3, label %Default [
|
|
i32 0, label %Foo
|
|
i32 1, label %Bar
|
|
i32 2, label %Baz
|
|
i32 5, label %TheDest
|
|
]
|
|
Default: ; preds = %0
|
|
ret i32 1234
|
|
Foo: ; preds = %0
|
|
ret i32 -2
|
|
Bar: ; preds = %0
|
|
ret i32 -5
|
|
Baz: ; preds = %0
|
|
ret i32 -6
|
|
TheDest: ; preds = %0
|
|
ret i32 -8
|
|
}
|
|
|
|
; Test folding all to same dest
|
|
define i32 @test3(i1 %C) {
|
|
br i1 %C, label %Start, label %TheDest
|
|
Start: ; preds = %0
|
|
switch i32 3, label %TheDest [
|
|
i32 0, label %TheDest
|
|
i32 1, label %TheDest
|
|
i32 2, label %TheDest
|
|
i32 5, label %TheDest
|
|
]
|
|
TheDest: ; preds = %Start, %Start, %Start, %Start, %Start, %0
|
|
ret i32 1234
|
|
}
|
|
|
|
; Test folding switch -> branch
|
|
define i32 @test4(i32 %C) {
|
|
switch i32 %C, label %L1 [
|
|
i32 0, label %L2
|
|
]
|
|
L1: ; preds = %0
|
|
ret i32 0
|
|
L2: ; preds = %0
|
|
ret i32 1
|
|
}
|
|
|
|
; Can fold into a cond branch!
|
|
define i32 @test5(i32 %C) {
|
|
switch i32 %C, label %L1 [
|
|
i32 0, label %L2
|
|
i32 123, label %L1
|
|
]
|
|
L1: ; preds = %0, %0
|
|
ret i32 0
|
|
L2: ; preds = %0
|
|
ret i32 1
|
|
}
|
|
|