derek.holloway
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75 lines
2.9 KiB
LLVM
75 lines
2.9 KiB
LLVM
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=thumb-apple-darwin -arm-global-merge -global-merge-group-by-use=false -global-merge-on-const=true | FileCheck %s
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; Test the ARMGlobalMerge pass. Use -mtriple=thumb because it has a small
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; value for the maximum offset (127).
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; A local array that exceeds the maximum offset should not be merged.
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; CHECK: g0:
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@g0 = internal global [32 x i32] [ i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 1, i32 2 ]
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; Global variables marked with "used" attribute must be kept
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; CHECK: g8
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@g8 = internal global i32 0
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@llvm.used = appending global [1 x ptr] [ptr @g8], section "llvm.metadata"
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; Global used in landing pad instruction must be kept
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; CHECK: ZTIi
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@_ZTIi = internal global ptr null
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define i32 @_Z9exceptioni(i32 %arg) personality ptr @__gxx_personality_sj0 {
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bb:
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%tmp = invoke i32 @_Z14throwSomethingi(i32 %arg)
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to label %bb9 unwind label %bb1
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bb1: ; preds = %bb
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%tmp2 = landingpad { ptr, i32 }
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catch ptr @_ZTIi
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%tmp3 = extractvalue { ptr, i32 } %tmp2, 1
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%tmp4 = tail call i32 @llvm.eh.typeid.for(ptr @_ZTIi)
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%tmp5 = icmp eq i32 %tmp3, %tmp4
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br i1 %tmp5, label %bb6, label %bb10
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bb6: ; preds = %bb1
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%tmp7 = extractvalue { ptr, i32 } %tmp2, 0
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%tmp8 = tail call ptr @__cxa_begin_catch(ptr %tmp7)
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tail call void @__cxa_end_catch()
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br label %bb9
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bb9: ; preds = %bb6, %bb
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%res.0 = phi i32 [ 0, %bb6 ], [ %tmp, %bb ]
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ret i32 %res.0
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bb10: ; preds = %bb1
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resume { ptr, i32 } %tmp2
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}
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declare i32 @_Z14throwSomethingi(i32)
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declare i32 @__gxx_personality_sj0(...)
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declare i32 @llvm.eh.typeid.for(ptr)
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declare ptr @__cxa_begin_catch(ptr)
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declare void @__cxa_end_catch()
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; CHECK: g3:
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; CHECK: _MergedGlobals:
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@g1 = internal global i32 1
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@g2 = internal global i32 2
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; Make sure that the complete variable fits within the range of the maximum
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; offset. Having the starting offset in range is not sufficient.
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; When this works properly, @g3 is not merged.
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@g3 = internal global [30 x i32] [ i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10 ], align 4
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; Global variables that can be placed in BSS should be kept together in a
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; separate pool of merged globals.
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; CHECK: _MergedGlobals.1
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@g4 = internal global i32 0
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@g5 = internal global i32 0
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; Global variables that are constant can be merged together
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; CHECK: _MergedGlobals.2
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@g6 = internal constant [12 x i32] zeroinitializer, align 4
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@g7 = internal constant [12 x i32] zeroinitializer, align 4
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