forked from OSchip/llvm-project
62 lines
1.2 KiB
LLVM
62 lines
1.2 KiB
LLVM
; RUN: llvm-upgrade < %s | llvm-as | opt -simplifycfg | llvm-dis | \
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; RUN: not grep switch
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int %test1() { ; Test normal folding
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switch uint 5, label %Default [
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uint 0, label %Foo
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uint 1, label %Bar
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uint 2, label %Baz
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uint 5, label %TheDest
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]
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Default:ret int -1
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Foo: ret int -2
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Bar: ret int -3
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Baz: ret int -4
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TheDest:ret int 1234
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}
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int %test2() { ; Test folding to default dest
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switch uint 3, label %Default [
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uint 0, label %Foo
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uint 1, label %Bar
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uint 2, label %Baz
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uint 5, label %TheDest
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]
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Default:ret int 1234
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Foo: ret int -2
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Bar: ret int -5
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Baz: ret int -6
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TheDest:ret int -8
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}
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int %test3(bool %C) { ; Test folding all to same dest
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br bool %C, label %Start, label %TheDest
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Start:
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switch uint 3, label %TheDest [
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uint 0, label %TheDest
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uint 1, label %TheDest
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uint 2, label %TheDest
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uint 5, label %TheDest
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]
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TheDest: ret int 1234
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}
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int %test4(uint %C) { ; Test folding switch -> branch
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switch uint %C, label %L1 [
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uint 0, label %L2
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]
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L1: ret int 0
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L2: ret int 1
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}
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int %test5(uint %C) {
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switch uint %C, label %L1 [ ; Can fold into a cond branch!
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uint 0, label %L2
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uint 123, label %L1
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]
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L1: ret int 0
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L2: ret int 1
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}
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