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llvm-6502/test/Transforms/SimplifyCFG/2003-08-17-FoldSwitch.ll
Dan Gohman f2f6ce65b7 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00

81 lines
2.0 KiB
LLVM

; RUN: opt < %s -simplifycfg -S | \
; RUN: not grep 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
}