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96 lines
2.8 KiB
LLVM
96 lines
2.8 KiB
LLVM
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; RUN: llc -mtriple=aarch64-apple-ios -asm-verbose=false \
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; RUN: -aarch64-enable-collect-loh=false -aarch64-enable-global-merge \
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; RUN: -global-merge-group-by-use -global-merge-ignore-single-use=false %s \
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; RUN: -o - | FileCheck %s
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; We assume that globals of the same size aren't reordered inside a set.
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; Check that we create two MergedGlobal instances for two functions using
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; disjoint sets of globals
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@m1 = internal global i32 0, align 4
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@n1 = internal global i32 0, align 4
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; CHECK-LABEL: f1:
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define void @f1(i32 %a1, i32 %a2) #0 {
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; CHECK-NEXT: adrp x8, [[SET1:__MergedGlobals.[0-9]*]]@PAGE
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; CHECK-NEXT: add x8, x8, [[SET1]]@PAGEOFF
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; CHECK-NEXT: stp w0, w1, [x8]
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; CHECK-NEXT: ret
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store i32 %a1, i32* @m1, align 4
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store i32 %a2, i32* @n1, align 4
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ret void
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}
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@m2 = internal global i32 0, align 4
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@n2 = internal global i32 0, align 4
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@o2 = internal global i32 0, align 4
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; CHECK-LABEL: f2:
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define void @f2(i32 %a1, i32 %a2, i32 %a3) #0 {
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; CHECK-NEXT: adrp x8, [[SET2:__MergedGlobals.[0-9]*]]@PAGE
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; CHECK-NEXT: add x8, x8, [[SET2]]@PAGEOFF
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; CHECK-NEXT: stp w0, w1, [x8]
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; CHECK-NEXT: str w2, [x8, #8]
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; CHECK-NEXT: ret
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store i32 %a1, i32* @m2, align 4
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store i32 %a2, i32* @n2, align 4
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store i32 %a3, i32* @o2, align 4
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ret void
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}
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; Sanity-check (don't worry about cost models) that we pick the biggest subset
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; of all global used "together" directly or indirectly. Here, that means
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; merging n3, m4, and n4 together, but ignoring m3.
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@m3 = internal global i32 0, align 4
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@n3 = internal global i32 0, align 4
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; CHECK-LABEL: f3:
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define void @f3(i32 %a1, i32 %a2) #0 {
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; CHECK-NEXT: adrp x8, _m3@PAGE
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; CHECK-NEXT: adrp x9, [[SET3:__MergedGlobals[0-9]*]]@PAGE
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; CHECK-NEXT: str w0, [x8, _m3@PAGEOFF]
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; CHECK-NEXT: str w1, [x9, [[SET3]]@PAGEOFF]
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; CHECK-NEXT: ret
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store i32 %a1, i32* @m3, align 4
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store i32 %a2, i32* @n3, align 4
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ret void
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}
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@m4 = internal global i32 0, align 4
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@n4 = internal global i32 0, align 4
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; CHECK-LABEL: f4:
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define void @f4(i32 %a1, i32 %a2, i32 %a3) #0 {
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; CHECK-NEXT: adrp x8, [[SET3]]@PAGE
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; CHECK-NEXT: add x8, x8, [[SET3]]@PAGEOFF
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; CHECK-NEXT: stp w2, w0, [x8]
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; CHECK-NEXT: str w1, [x8, #8]
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; CHECK-NEXT: ret
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store i32 %a1, i32* @m4, align 4
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store i32 %a2, i32* @n4, align 4
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store i32 %a3, i32* @n3, align 4
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ret void
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}
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; Finally, check that we don't do anything with one-element global sets.
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@o5 = internal global i32 0, align 4
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; CHECK-LABEL: f5:
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define void @f5(i32 %a1) #0 {
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; CHECK-NEXT: adrp x8, _o5@PAGE
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; CHECK-NEXT: str w0, [x8, _o5@PAGEOFF]
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; CHECK-NEXT: ret
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store i32 %a1, i32* @o5, align 4
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ret void
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}
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; CHECK-DAG: .zerofill __DATA,__bss,_o5,4,2
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; CHECK-DAG: .zerofill __DATA,__bss,[[SET1]],8,3
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; CHECK-DAG: .zerofill __DATA,__bss,[[SET2]],12,3
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; CHECK-DAG: .zerofill __DATA,__bss,[[SET3]],12,3
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attributes #0 = { nounwind }
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