1 ; RUN: llc -mtriple=aarch64-apple-ios -asm-verbose=false -aarch64-collect-loh=false \ 2 ; RUN: -aarch64-global-merge -global-merge-group-by-use -global-merge-ignore-single-use=false \ 3 ; RUN: %s -o - | FileCheck %s 4 5 ; We assume that globals of the same size aren't reordered inside a set. 6 7 ; Check that we create two MergedGlobal instances for two functions using 8 ; disjoint sets of globals 9 10 @m1 = internal global i32 0, align 4 11 @n1 = internal global i32 0, align 4 12 13 ; CHECK-LABEL: f1: 14 define void @f1(i32 %a1, i32 %a2) #0 { 15 ; CHECK-NEXT: adrp x8, [[SET1:l__MergedGlobals.[0-9]*]]@PAGE 16 ; CHECK-NEXT: add x8, x8, [[SET1]]@PAGEOFF 17 ; CHECK-NEXT: stp w0, w1, [x8] 18 ; CHECK-NEXT: ret 19 store i32 %a1, i32* @m1, align 4 20 store i32 %a2, i32* @n1, align 4 21 ret void 22 } 23 24 @m2 = internal global i32 0, align 4 25 @n2 = internal global i32 0, align 4 26 @o2 = internal global i32 0, align 4 27 28 ; CHECK-LABEL: f2: 29 define void @f2(i32 %a1, i32 %a2, i32 %a3) #0 { 30 ; CHECK-NEXT: adrp x8, [[SET2:l__MergedGlobals.[0-9]*]]@PAGE 31 ; CHECK-NEXT: add x8, x8, [[SET2]]@PAGEOFF 32 ; CHECK-NEXT: stp w0, w1, [x8] 33 ; CHECK-NEXT: str w2, [x8, #8] 34 ; CHECK-NEXT: ret 35 store i32 %a1, i32* @m2, align 4 36 store i32 %a2, i32* @n2, align 4 37 store i32 %a3, i32* @o2, align 4 38 ret void 39 } 40 41 ; Sanity-check (don't worry about cost models) that we pick the biggest subset 42 ; of all global used "together" directly or indirectly. Here, that means 43 ; merging n3, m4, and n4 together, but ignoring m3. 44 45 @m3 = internal global i32 0, align 4 46 @n3 = internal global i32 0, align 4 47 48 ; CHECK-LABEL: f3: 49 define void @f3(i32 %a1, i32 %a2) #0 { 50 ; CHECK-NEXT: adrp x8, _m3@PAGE 51 ; CHECK-NEXT: adrp x9, [[SET3:l__MergedGlobals[0-9]*]]@PAGE 52 ; CHECK-NEXT: str w0, [x8, _m3@PAGEOFF] 53 ; CHECK-NEXT: str w1, [x9, [[SET3]]@PAGEOFF] 54 ; CHECK-NEXT: ret 55 store i32 %a1, i32* @m3, align 4 56 store i32 %a2, i32* @n3, align 4 57 ret void 58 } 59 60 @m4 = internal global i32 0, align 4 61 @n4 = internal global i32 0, align 4 62 63 ; CHECK-LABEL: f4: 64 define void @f4(i32 %a1, i32 %a2, i32 %a3) #0 { 65 ; CHECK-NEXT: adrp x8, [[SET3]]@PAGE 66 ; CHECK-NEXT: add x8, x8, [[SET3]]@PAGEOFF 67 ; CHECK-NEXT: stp w2, w0, [x8] 68 ; CHECK-NEXT: str w1, [x8, #8] 69 ; CHECK-NEXT: ret 70 store i32 %a1, i32* @m4, align 4 71 store i32 %a2, i32* @n4, align 4 72 store i32 %a3, i32* @n3, align 4 73 ret void 74 } 75 76 ; Finally, check that we don't do anything with one-element global sets. 77 @o5 = internal global i32 0, align 4 78 79 ; CHECK-LABEL: f5: 80 define void @f5(i32 %a1) #0 { 81 ; CHECK-NEXT: adrp x8, _o5@PAGE 82 ; CHECK-NEXT: str w0, [x8, _o5@PAGEOFF] 83 ; CHECK-NEXT: ret 84 store i32 %a1, i32* @o5, align 4 85 ret void 86 } 87 88 ; CHECK-DAG: .zerofill __DATA,__bss,_o5,4,2 89 90 ; CHECK-DAG: .zerofill __DATA,__bss,[[SET1]],8,3 91 ; CHECK-DAG: .zerofill __DATA,__bss,[[SET2]],12,3 92 ; CHECK-DAG: .zerofill __DATA,__bss,[[SET3]],12,3 93 94 attributes #0 = { nounwind } 95
