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New testcase to ensure that switch folding happens correctly 

llvm-svn: 7922
This commit is contained in:
Chris Lattner 2003-08-17 20:19:31 +00:00
parent 031340a551
commit 26dc7b6224
1 changed files with 49 additions and 0 deletions
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49
llvm/test/Regression/Transforms/SimplifyCFG/2003-08-17-FoldSwitch.ll Normal file
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; RUN: as < %s | opt -simplifycfg | dis | not grep switch
int %test1() { ; Test normal folding
switch uint 5, label %Default [
uint 0, label %Foo
uint 1, label %Bar
uint 2, label %Baz
uint 5, label %TheDest
]
Default:ret int -1
Foo: ret int -2
Bar: ret int -3
Baz: ret int -4
TheDest:ret int 1234
}
int %test2() { ; Test folding to default dest
switch uint 3, label %Default [
uint 0, label %Foo
uint 1, label %Bar
uint 2, label %Baz
uint 5, label %TheDest
]
Default:ret int 1234
Foo: ret int -2
Bar: ret int -5
Baz: ret int -6
TheDest:ret int -8
}
int %test3(bool %C) { ; Test folding all to same dest
br bool %C, label %Start, label %TheDest
Start:
switch uint 3, label %TheDest [
uint 0, label %TheDest
uint 1, label %TheDest
uint 2, label %TheDest
uint 5, label %TheDest
]
TheDest: ret int 1234
}
int %test4(uint %C) { ; Test folding switch -> branch
switch uint %C, label %L1 [
uint 0, label %L2
]
L1: ret int 0
L2: ret int 1
}