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Previously in a vector of pointers, the pointer couldn't be any pointer type, it had to be a pointer to an integer or floating point type. This is a hassle for dragonegg because the GCC vectorizer happily produces vectors of pointers where the pointer is a pointer to a struct or whatever. Vector getelementptr was restricted to just one index, but now that vectors of pointers can have any pointer type it is more natural to allow arbitrary vector getelementptrs. There is however the issue of struct GEPs, where if each lane chose different struct fields then from that point on each lane will be working down into unrelated types. This seems like too much pain for too little gain, so when you have a vector struct index all the elements are required to be the same. llvm-svn: 167828
38 lines
1.6 KiB
LLVM
38 lines
1.6 KiB
LLVM
; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
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; Verify that over-indexed getelementptrs are folded.
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@A = external global [2 x [3 x [5 x [7 x i32]]]]
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@B = global i32* getelementptr ([2 x [3 x [5 x [7 x i32]]]]* @A, i64 0, i64 0, i64 2, i64 1, i64 7523)
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; CHECK: @B = global i32* getelementptr ([2 x [3 x [5 x [7 x i32]]]]* @A, i64 36, i64 0, i64 1, i64 0, i64 5)
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@C = global i32* getelementptr ([2 x [3 x [5 x [7 x i32]]]]* @A, i64 3, i64 2, i64 0, i64 0, i64 7523)
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; CHECK: @C = global i32* getelementptr ([2 x [3 x [5 x [7 x i32]]]]* @A, i64 39, i64 1, i64 1, i64 4, i64 5)
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; Verify that i16 indices work.
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@x = external global {i32, i32}
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@y = global i32* getelementptr ({ i32, i32 }* @x, i16 42, i32 0)
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; CHECK: @y = global i32* getelementptr ({ i32, i32 }* @x, i16 42, i32 0)
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; See if i92 indices work too.
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define i32 *@test({i32, i32}* %t, i92 %n) {
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; CHECK: @test
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; CHECK: %B = getelementptr { i32, i32 }* %t, i92 %n, i32 0
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%B = getelementptr {i32, i32}* %t, i92 %n, i32 0
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ret i32* %B
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}
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; Verify that constant expression vector GEPs work.
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@z = global <2 x i32*> getelementptr (<2 x [3 x {i32, i32}]*> zeroinitializer, <2 x i32> <i32 1, i32 2>, <2 x i32> <i32 2, i32 3>, <2 x i32> <i32 1, i32 1>)
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; Verify that struct GEP works with a vector of pointers.
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define <2 x i32*> @test7(<2 x {i32, i32}*> %a) {
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%w = getelementptr <2 x {i32, i32}*> %a, <2 x i32> <i32 5, i32 9>, <2 x i32> zeroinitializer
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ret <2 x i32*> %w
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}
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; Verify that array GEP works with a vector of pointers.
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define <2 x i8*> @test8(<2 x [2 x i8]*> %a) {
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%w = getelementptr <2 x [2 x i8]*> %a, <2 x i32> <i32 0, i32 0>, <2 x i8> <i8 0, i8 1>
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ret <2 x i8*> %w
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}
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