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Make constant folding for GEPs a bit more aggressive.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146639 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2011-12-15 04:33:48 +00:00
parent ca072a3977
commit adeb0a6e64
2 changed files with 6 additions and 3 deletions
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7
test/Other/constant-fold-gep.ll
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@@ -102,14 +102,17 @@
@N = constant i64* getelementptr ({ i64, i64 }* null, i32 0, i32 1)
@O = constant i64* getelementptr ([2 x i64]* null, i32 0, i32 1)
; Fold GEP of a GEP. Theoretically some of these cases could be folded
; without using targetdata, however that's not implemented yet.
; Fold GEP of a GEP. Very simple cases are folded without targetdata.
; PLAIN: @Y = global [3 x { i32, i32 }]* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 2)
; PLAIN: @Z = global i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 0, i64 1, i32 0), i64 1)
; OPT: @Y = global [3 x { i32, i32 }]* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 2)
; OPT: @Z = global i32* getelementptr (i32* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 0, i64 1, i32 0), i64 1)
; TO: @Y = global [3 x { i32, i32 }]* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 2)
; TO: @Z = global i32* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 0, i64 1, i32 1)
@ext = external global [3 x { i32, i32 }]
@Y = global [3 x { i32, i32 }]* getelementptr inbounds ([3 x { i32, i32 }]* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 1), i64 1)
@Z = global i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 0, i64 1, i32 0), i64 1)
; Duplicate all of the above as function return values rather than