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d47e6aeb93
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52317 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
1002 B
LLVM
25 lines
1002 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep extractvalue
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; Instcombine should fold various combinations of insertvalue and extractvalue
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; together
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declare void @bar({i32, i32} %a)
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define i32 @foo() {
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; Build a simple struct and pull values out again
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%s1.1 = insertvalue {i32, i32} undef, i32 0, 0
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%s1 = insertvalue {i32, i32} %s1.1, i32 1, 1
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%v1 = extractvalue {i32, i32} %s1, 0
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%v2 = extractvalue {i32, i32} %s1, 1
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; Build a nested struct and pull a sub struct out of it
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; This requires instcombine to insert a few insertvalue instructions
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%ns1.1 = insertvalue {i32, {i32, i32}} undef, i32 %v1, 0
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%ns1.2 = insertvalue {i32, {i32, i32}} %ns1.1, i32 %v1, 1, 0
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%ns1 = insertvalue {i32, {i32, i32}} %ns1.2, i32 %v2, 1, 1
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%s2 = extractvalue {i32, {i32, i32}} %ns1, 1
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call void @bar({i32, i32} %s2)
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%v3 = extractvalue {i32, {i32, i32}} %ns1, 1, 1
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ret i32 %v3
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}
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