1 ; RUN: llc < %s -mtriple=thumb-apple-darwin -arm-global-merge -global-merge-group-by-use=false -global-merge-on-const=true | FileCheck %s 2 ; Test the ARMGlobalMerge pass. Use -march=thumb because it has a small 3 ; value for the maximum offset (127). 4 5 ; A local array that exceeds the maximum offset should not be merged. 6 ; CHECK: g0: 7 @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 ] 8 9 ; Global variables marked with "used" attribute must be kept 10 ; CHECK: g8 11 @g8 = internal global i32 0 12 @llvm.used = appending global [1 x i8*] [i8* bitcast (i32* @g8 to i8*)], section "llvm.metadata" 13 14 ; Global used in landing pad instruction must be kept 15 ; CHECK: ZTIi 16 @_ZTIi = internal global i8* null 17 18 define i32 @_Z9exceptioni(i32 %arg) personality i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*) { 19 bb: 20 %tmp = invoke i32 @_Z14throwSomethingi(i32 %arg) 21 to label %bb9 unwind label %bb1 22 23 bb1: ; preds = %bb 24 %tmp2 = landingpad { i8*, i32 } 25 catch i8* bitcast (i8** @_ZTIi to i8*) 26 %tmp3 = extractvalue { i8*, i32 } %tmp2, 1 27 %tmp4 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) 28 %tmp5 = icmp eq i32 %tmp3, %tmp4 29 br i1 %tmp5, label %bb6, label %bb10 30 31 bb6: ; preds = %bb1 32 %tmp7 = extractvalue { i8*, i32 } %tmp2, 0 33 %tmp8 = tail call i8* @__cxa_begin_catch(i8* %tmp7) 34 tail call void @__cxa_end_catch() 35 br label %bb9 36 37 bb9: ; preds = %bb6, %bb 38 %res.0 = phi i32 [ 0, %bb6 ], [ %tmp, %bb ] 39 ret i32 %res.0 40 41 bb10: ; preds = %bb1 42 resume { i8*, i32 } %tmp2 43 } 44 45 declare i32 @_Z14throwSomethingi(i32) 46 47 declare i32 @__gxx_personality_sj0(...) 48 49 declare i32 @llvm.eh.typeid.for(i8*) 50 51 declare i8* @__cxa_begin_catch(i8*) 52 53 declare void @__cxa_end_catch() 54 55 ; CHECK: _MergedGlobals: 56 @g1 = internal global i32 1 57 @g2 = internal global i32 2 58 59 ; Make sure that the complete variable fits within the range of the maximum 60 ; offset. Having the starting offset in range is not sufficient. 61 ; When this works properly, @g3 is placed in a separate chunk of merged globals. 62 ; CHECK: _MergedGlobals.1: 63 @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 64 65 ; Global variables that can be placed in BSS should be kept together in a 66 ; separate pool of merged globals. 67 ; CHECK: _MergedGlobals.2 68 @g4 = internal global i32 0 69 @g5 = internal global i32 0 70 71 ; Global variables that are constant can be merged together 72 ; CHECK: _MergedGlobals.3 73 @g6 = internal constant [12 x i32] zeroinitializer, align 4 74 @g7 = internal constant [12 x i32] zeroinitializer, align 4 75
