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Diffstat (limited to 'test/Transforms/GVNSink/struct.ll')
| -rw-r--r-- | test/Transforms/GVNSink/struct.ll | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/test/Transforms/GVNSink/struct.ll b/test/Transforms/GVNSink/struct.ll new file mode 100644 index 000000000000..2228cf2803ae --- /dev/null +++ b/test/Transforms/GVNSink/struct.ll @@ -0,0 +1,71 @@ +; RUN: opt -gvn-sink -S < %s | FileCheck %s + +%struct = type {i32, i32} +%struct2 = type { [ 2 x i32], i32 } + +; Struct indices cannot be variant. + +; CHECK-LABEL: @f() { +; CHECK: getelementptr +; CHECK: getelementptr +define void @f() { +bb: + br i1 undef, label %bb2, label %bb1 + +bb1: ; preds = %bb + %tmp = getelementptr inbounds %struct, %struct* null, i64 0, i32 1 + br label %bb4 + +bb2: ; preds = %bb + %tmp3 = getelementptr inbounds %struct, %struct* null, i64 0, i32 0 + br label %bb4 + +bb4: ; preds = %bb2, %bb1 + %tmp5 = phi i32 [ 1, %bb1 ], [ 0, %bb2 ] + ret void +} + +; Struct indices cannot be variant. + +; CHECK-LABEL: @g() { +; CHECK: getelementptr +; CHECK: getelementptr +define void @g() { +bb: + br i1 undef, label %bb2, label %bb1 + +bb1: ; preds = %bb + %tmp = getelementptr inbounds %struct2, %struct2* null, i64 0, i32 0, i32 1 + br label %bb4 + +bb2: ; preds = %bb + %tmp3 = getelementptr inbounds %struct2, %struct2* null, i64 0, i32 0, i32 0 + br label %bb4 + +bb4: ; preds = %bb2, %bb1 + %tmp5 = phi i32 [ 1, %bb1 ], [ 0, %bb2 ] + ret void +} + + +; ... but the first parameter to a GEP can. + +; CHECK-LABEL: @h() { +; CHECK: getelementptr +; CHECK-NOT: getelementptr +define void @h() { +bb: + br i1 undef, label %bb2, label %bb1 + +bb1: ; preds = %bb + %tmp = getelementptr inbounds %struct, %struct* null, i32 0, i32 0 + br label %bb4 + +bb2: ; preds = %bb + %tmp3 = getelementptr inbounds %struct, %struct* null, i32 1, i32 0 + br label %bb4 + +bb4: ; preds = %bb2, %bb1 + %tmp5 = phi i32 [ 0, %bb1 ], [ 1, %bb2 ] + ret void +}
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