65 lines
1.1 KiB
LLVM
65 lines
1.1 KiB
LLVM
|
; RUN: opt %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
|
||
|
|
|
||
|
|
declare i32 @f(i32)
|
||
|
|
|
||
|
|
define i32 @basic(i32 %x) {
|
||
|
|
; CHECK-LABEL: @basic
|
||
|
|
; CHECK-LABEL: entry:
|
||
|
|
; CHECK-NEXT: call i32 @f(i32 0)
|
||
|
|
; CHECK-NEXT: ret i32 %0
|
||
|
|
|
||
|
|
entry:
|
||
|
|
switch i32 %x, label %default [
|
||
|
|
i32 5, label %default
|
||
|
|
i32 6, label %default
|
||
|
|
i32 7, label %default
|
||
|
|
]
|
||
|
|
default:
|
||
|
|
%0 = call i32 @f(i32 0)
|
||
|
|
ret i32 %0
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
define i32 @constant() {
|
||
|
|
; CHECK-LABEL: @constant
|
||
|
|
; CHECK-LABEL: entry:
|
||
|
|
; CHECK-NEXT: call i32 @f(i32 1)
|
||
|
|
; CHECK-NEXT: ret i32 %0
|
||
|
|
|
||
|
|
entry:
|
||
|
|
switch i32 42, label %default [
|
||
|
|
i32 41, label %default
|
||
|
|
i32 42, label %a
|
||
|
|
i32 43, label %b
|
||
|
|
]
|
||
|
|
default:
|
||
|
|
%0 = call i32 @f(i32 0)
|
||
|
|
ret i32 %0
|
||
|
|
a:
|
||
|
|
%1 = call i32 @f(i32 1)
|
||
|
|
ret i32 %1
|
||
|
|
b:
|
||
|
|
%2 = call i32 @f(i32 2)
|
||
|
|
ret i32 %2
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
define i32 @unreachable(i32 %x) {
|
||
|
|
; CHECK-LABEL: @unreachable
|
||
|
|
; CHECK-LABEL: entry:
|
||
|
|
; CHECK-NEXT: call i32 @f(i32 0)
|
||
|
|
; CHECK-NEXT: ret i32 %0
|
||
|
|
|
||
|
|
entry:
|
||
|
|
switch i32 %x, label %unreachable [
|
||
|
|
i32 5, label %a
|
||
|
|
i32 6, label %a
|
||
|
|
i32 7, label %a
|
||
|
|
]
|
||
|
|
unreachable:
|
||
|
|
unreachable
|
||
|
|
a:
|
||
|
|
%0 = call i32 @f(i32 0)
|
||
|
|
ret i32 %0
|
||
|
|
}
|