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[IPO/MergeFunctions] changes so it doesn't try to bitcast a struct return type but instead recreates it with insert/extract value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207679 91177308-0d34-0410-b5e6-96231b3b80d8
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40
test/Transforms/MergeFunc/mergefunc-struct-return.ll
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40
test/Transforms/MergeFunc/mergefunc-struct-return.ll
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@@ -0,0 +1,40 @@
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; RUN: opt -mergefunc -S < %s | FileCheck %s
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; This test makes sure that the mergefunc pass, uses extract and insert value
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; to convert the struct result type; as struct types cannot be bitcast.
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target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
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%kv1 = type { i32*, i32* }
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%kv2 = type { i8*, i8* }
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declare void @noop()
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define %kv1 @fn1() {
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; CHECK-LABEL: @fn1(
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%tmp = alloca %kv1
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%v1 = getelementptr %kv1* %tmp, i32 0, i32 0
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store i32* null, i32** %v1
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%v2 = getelementptr %kv1* %tmp, i32 0, i32 0
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store i32* null, i32** %v2
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call void @noop()
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%v3 = load %kv1* %tmp
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ret %kv1 %v3
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}
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define %kv2 @fn2() {
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; CHECK-LABEL: @fn2(
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; CHECK: %1 = tail call %kv1 @fn1()
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; CHECK: %2 = extractvalue %kv1 %1, 0
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; CHECK: %3 = bitcast i32* %2 to i8*
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; CHECK: %4 = insertvalue %kv2 undef, i8* %3, 0
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%tmp = alloca %kv2
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%v1 = getelementptr %kv2* %tmp, i32 0, i32 0
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store i8* null, i8** %v1
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%v2 = getelementptr %kv2* %tmp, i32 0, i32 0
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store i8* null, i8** %v2
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call void @noop()
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%v3 = load %kv2* %tmp
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ret %kv2 %v3
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}
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