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