mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
39 lines
1.5 KiB
LLVM
39 lines
1.5 KiB
LLVM
; RUN: opt < %s -instcombine -S | not grep extractvalue
|
|
|
|
; Instcombine should fold various combinations of insertvalue and extractvalue
|
|
; together
|
|
declare void @bar({i32, i32} %a)
|
|
|
|
define i32 @foo() {
|
|
; Build a simple struct and pull values out again
|
|
%s1.1 = insertvalue {i32, i32} undef, i32 0, 0
|
|
%s1 = insertvalue {i32, i32} %s1.1, i32 1, 1
|
|
%v1 = extractvalue {i32, i32} %s1, 0
|
|
%v2 = extractvalue {i32, i32} %s1, 1
|
|
|
|
; Build a nested struct and pull a sub struct out of it
|
|
; This requires instcombine to insert a few insertvalue instructions
|
|
%ns1.1 = insertvalue {i32, {i32, i32}} undef, i32 %v1, 0
|
|
%ns1.2 = insertvalue {i32, {i32, i32}} %ns1.1, i32 %v1, 1, 0
|
|
%ns1 = insertvalue {i32, {i32, i32}} %ns1.2, i32 %v2, 1, 1
|
|
%s2 = extractvalue {i32, {i32, i32}} %ns1, 1
|
|
%v3 = extractvalue {i32, {i32, i32}} %ns1, 1, 1
|
|
call void @bar({i32, i32} %s2)
|
|
|
|
; Use nested extractvalues to get to a value
|
|
%s3 = extractvalue {i32, {i32, i32}} %ns1, 1
|
|
%v4 = extractvalue {i32, i32} %s3, 1
|
|
call void @bar({i32, i32} %s3)
|
|
|
|
; Use nested insertvalues to build a nested struct
|
|
%s4.1 = insertvalue {i32, i32} undef, i32 %v3, 0
|
|
%s4 = insertvalue {i32, i32} %s4.1, i32 %v4, 1
|
|
%ns2 = insertvalue {i32, {i32, i32}} undef, {i32, i32} %s4, 1
|
|
|
|
; And now extract a single value from there
|
|
%v5 = extractvalue {i32, {i32, i32}} %ns2, 1, 1
|
|
|
|
ret i32 %v5
|
|
}
|
|
|