llvm-6502/test/Transforms/SimplifyCFG/switch_switch_fold.ll
2004-02-24 07:21:09 +00:00

47 lines
972 B
LLVM

; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | grep switch | wc -l | grep 1
; 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()
void %test1(uint %V) {
switch uint %V, label %F [
uint 4, label %T
uint 17, label %T
uint 5, label %T
uint 1234, label %F
]
T:
switch uint %V, label %F [
uint 4, label %A
uint 17, label %B
uint 42, label %C
]
A:
call void %foo1()
ret void
B:
call void %foo2()
ret void
C:
call void %foo3()
ret void
F:
switch uint %V, label %F [
uint 4, label %B
uint 18, label %B
uint 42, label %D
]
D:
call void %foo4()
ret void
}