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570b485d61
Once the default for SimplifyCFG flips, we can no longer pass nullptr instead of DomTree to SimplifyCFG, so we need to propagate it here. We don't strictly need to actually preserve DomTree in DwarfEHPrepare, but we might as well do it, since it's trivial.
75 lines
3.0 KiB
LLVM
75 lines
3.0 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 i8*] [i8* bitcast (i32* @g8 to i8*)], 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 i8* null
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define i32 @_Z9exceptioni(i32 %arg) personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*) {
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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 { i8*, i32 }
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catch i8* bitcast (i8** @_ZTIi to i8*)
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%tmp3 = extractvalue { i8*, i32 } %tmp2, 1
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%tmp4 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
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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 { i8*, i32 } %tmp2, 0
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%tmp8 = tail call i8* @__cxa_begin_catch(i8* %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 { i8*, 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(i8*)
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declare i8* @__cxa_begin_catch(i8*)
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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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