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6dcbcbb6e8
This is a partial revert of r244615 (http://reviews.llvm.org/D11942), which caused a major regression in debug info quality. Turning the artificial __MergedGlobal symbols into private symbols (l__MergedGlobal) means that the linker will not include them in the symbol table of the final executable. Without a symbol table entry dsymutil is not be able to process the debug info for any of the merged globals and thus drops the debug info for all of them. This patch is enabling the old behavior for all MachO targets while leaving all other targets unaffected. rdar://problem/29160481 https://reviews.llvm.org/D26531 llvm-svn: 286607
96 lines
2.8 KiB
LLVM
96 lines
2.8 KiB
LLVM
; 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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