93 lines
3.5 KiB
LLVM
93 lines
3.5 KiB
LLVM
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; RUN: llc -mtriple=arm64-apple-darwin %s -o - | FileCheck %s
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; GOT equivalent globals references can be replaced by the GOT entry of the
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; final symbol instead.
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%struct.data = type { i32, %struct.anon }
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%struct.anon = type { i32, i32 }
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@localfoo = global i32 42
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@localgotequiv = private unnamed_addr constant i32* @localfoo
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@extfoo = external global i32
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@extgotequiv = private unnamed_addr constant i32* @extfoo
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; Don't replace GOT equivalent usage within instructions and emit the GOT
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; equivalent since it can't be replaced by the GOT entry. @bargotequiv is
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; used by an instruction inside @t0.
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;
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; CHECK: l_bargotequiv:
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; CHECK-NEXT: .quad _extbar
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@extbar = external global i32
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@bargotequiv = private unnamed_addr constant i32* @extbar
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@table = global [4 x %struct.data] [
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; CHECK-LABEL: _table
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%struct.data { i32 1, %struct.anon { i32 2, i32 3 } },
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; Test GOT equivalent usage inside nested constant arrays.
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; CHECK: .long 5
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; CHECK-NOT: .long _localgotequiv-(_table+20)
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; CHECK-NEXT: Ltmp0:
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; CHECK-NEXT: .long _localfoo@GOT-Ltmp0
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%struct.data { i32 4, %struct.anon { i32 5,
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i32 trunc (i64 sub (i64 ptrtoint (i32** @localgotequiv to i64),
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i64 ptrtoint (i32* getelementptr inbounds ([4 x %struct.data], [4 x %struct.data]* @table, i32 0, i64 1, i32 1, i32 1) to i64))
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to i32)}
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},
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; CHECK: .long 5
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; CHECK-NOT: _extgotequiv-(_table+32)
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; CHECK-NEXT: Ltmp1:
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; CHECK-NEXT: _extfoo@GOT-Ltmp1
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%struct.data { i32 4, %struct.anon { i32 5,
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i32 trunc (i64 sub (i64 ptrtoint (i32** @extgotequiv to i64),
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i64 ptrtoint (i32* getelementptr inbounds ([4 x %struct.data], [4 x %struct.data]* @table, i32 0, i64 2, i32 1, i32 1) to i64))
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to i32)}
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},
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; Test support for arbitrary constants into the GOTPCREL offset, which is
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; supported on x86-64 but not on ARM64
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; CHECK: .long 5
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; CHECK-NEXT: .long ((l_extgotequiv-_table)-44)+24
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%struct.data { i32 4, %struct.anon { i32 5,
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i32 add (i32 trunc (i64 sub (i64 ptrtoint (i32** @extgotequiv to i64),
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i64 ptrtoint (i32* getelementptr inbounds ([4 x %struct.data], [4 x %struct.data]* @table, i32 0, i64 3, i32 1, i32 1) to i64))
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to i32), i32 24)}
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}
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], align 16
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; Test multiple uses of GOT equivalents.
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; CHECK-LABEL: _delta
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; CHECK: Ltmp2:
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; CHECK-NEXT: .long _extfoo@GOT-Ltmp2
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@delta = global i32 trunc (i64 sub (i64 ptrtoint (i32** @extgotequiv to i64),
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i64 ptrtoint (i32* @delta to i64))
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to i32)
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; CHECK-LABEL: _deltaplus:
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; CHECK: .long (l_localgotequiv-_deltaplus)+55
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@deltaplus = global i32 add (i32 trunc (i64 sub (i64 ptrtoint (i32** @localgotequiv to i64),
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i64 ptrtoint (i32* @deltaplus to i64))
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to i32), i32 55)
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define i32 @t0(i32 %a) {
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%x = add i32 trunc (i64 sub (i64 ptrtoint (i32** @bargotequiv to i64),
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i64 ptrtoint (i32 (i32)* @t0 to i64))
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to i32), %a
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ret i32 %x
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}
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; Check that these got equivalent symbols are emitted on ARM64. Since ARM64
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; does not support encoding an extra offset with @GOT, we still need to emit the
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; equivalents for use by such IR constructs. Check them at the end of the test
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; since they will start out as GOT equivalent candidates, but they are actually
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; needed and are therefore emitted at the end.
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; CHECK-LABEL: l_localgotequiv:
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; CHECK-NEXT: .quad _localfoo
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; CHECK-LABEL: l_extgotequiv:
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; CHECK-NEXT: .quad _extfoo
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