1 ; This test shows an alloca of a struct and an array that can be reduced to 2 ; multiple variables easily. However, the alloca is used by a store 3 ; instruction, which was not possible before aggregrates were first class 4 ; values. This checks of scalarrepl splits up the struct and array properly. 5 6 ; RUN: opt < %s -scalarrepl -S | not grep alloca 7 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64" 8 9 define i32 @foo() { 10 %target = alloca { i32, i32 } ; <{ i32, i32 }*> [#uses=1] 11 ; Build a first class struct to store 12 %res1 = insertvalue { i32, i32 } undef, i32 1, 0 ; <{ i32, i32 }> [#uses=1] 13 %res2 = insertvalue { i32, i32 } %res1, i32 2, 1 ; <{ i32, i32 }> [#uses=1] 14 ; And store it 15 store { i32, i32 } %res2, { i32, i32 }* %target 16 ; Actually use %target, so it doesn't get removed altogether 17 %ptr = getelementptr { i32, i32 }* %target, i32 0, i32 0 18 %val = load i32* %ptr 19 ret i32 %val 20 } 21 22 define i32 @bar() { 23 %target = alloca [ 2 x i32 ] ; <{ i32, i32 }*> [#uses=1] 24 ; Build a first class array to store 25 %res1 = insertvalue [ 2 x i32 ] undef, i32 1, 0 ; <{ i32, i32 }> [#uses=1] 26 %res2 = insertvalue [ 2 x i32 ] %res1, i32 2, 1 ; <{ i32, i32 }> [#uses=1] 27 ; And store it 28 store [ 2 x i32 ] %res2, [ 2 x i32 ]* %target 29 ; Actually use %target, so it doesn't get removed altogether 30 %ptr = getelementptr [ 2 x i32 ]* %target, i32 0, i32 0 31 %val = load i32* %ptr 32 ret i32 %val 33 } 34
