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| author | Chris Lattner <sabre@nondot.org> | 2010-01-03 03:03:27 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-01-03 03:03:27 +0000 |
| commit | 56ba7a74b9959ebfdcb762f8e920db1976e50d41 (patch) | |
| tree | c6230104900e1c1578ae4c6bc07177cbbd8c93ac /test/Transforms/InstCombine/load-cmp.ll | |
| parent | 11ed0317bc3ee77e7d97140df6f7471fe140a7b1 (diff) | |
generalize the previous transformation to handle indexing into
arrays of structs and other arrays, so long as all the subsequent
indexes are constants. This triggers frequently for stuff like:
@divisions = internal constant [29 x [2 x i32]] [[2 x i32] zeroinitializer, [2 x i32] [i32 0, i32 1], [2 x i32] [i32 0, i32 2], [2 x i32] [i32 0, i32 1], [2 x i32] zeroinitializer, [2 x i32] [i32 0, i32 1], [2 x i32] [i32 0, i32 1], [2 x i32] [i32 0, i32 2], [2 x i32] [i32 0, i32 2], [2 x i32] zeroinitializer, [2 x i32] zeroinitializer, [2 x i32] zeroinitializer, [2 x i32] [i32 0, i32 2], [2 x i32] [i32 0, i32 1], [2 x i32] zeroinitializer, [2 x i32] [i32 1, i32 0], [2 x i32] [i32 1, i32 1], [2 x i32] [i32 1, i32 1], [2 x i32] [i32 1, i32 2], [2 x i32] [i32 1, i32 1], [2 x i32] [i32 1, i32 0], [2 x i32] [i32 1, i32 2], [2 x i32] [i32 1, i32 2], [2 x i32] [i32 1, i32 0], [2 x i32] [i32 1, i32 0], [2 x i32] [i32 1, i32 0], [2 x i32] [i32 1, i32 1], [2 x i32] [i32 1, i32 2], [2 x i32] [i32 1, i32 2]], align 32 ; <[29 x [2 x i32]]*> [#uses=50]
%623 = getelementptr inbounds [29 x [2 x i32]]* @divisions, i64 0, i64 %619, i64 0 ; <i32*> [#uses=1]
%684 = icmp eq i32 %683, 999
also for the "my_defs" table in 'gs', etc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92444 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/load-cmp.ll')
| -rw-r--r-- | test/Transforms/InstCombine/load-cmp.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/load-cmp.ll b/test/Transforms/InstCombine/load-cmp.ll index 6ec5524094..a3b68316aa 100644 --- a/test/Transforms/InstCombine/load-cmp.ll +++ b/test/Transforms/InstCombine/load-cmp.ll @@ -92,3 +92,21 @@ define i1 @test8(i32 %X) { ; CHECK-NEXT: %S = icmp ult i32 {{.*}}, 2 ; CHECK-NEXT: ret i1 %S } + +@GA = internal constant [4 x { i32, i32 } ] [ + { i32, i32 } { i32 1, i32 0 }, + { i32, i32 } { i32 2, i32 1 }, + { i32, i32 } { i32 3, i32 1 }, + { i32, i32 } { i32 4, i32 0 } +] + +define i1 @test9(i32 %X) { + %P = getelementptr [4 x { i32, i32 } ]* @GA, i32 0, i32 %X, i32 1 + %Q = load i32* %P + %R = icmp eq i32 %Q, 1 + ret i1 %R +; CHECK: @test9 +; CHECK-NEXT: add i32 %X, -1 +; CHECK-NEXT: %R = icmp ult i32 {{.*}}, 2 +; CHECK-NEXT: ret i1 %R +} |