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102 lines
3.6 KiB
102 lines
3.6 KiB
4 months ago
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; RUN: llc -mtriple=x86_64-apple-darwin %s -o %t
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; RUN: FileCheck %s -check-prefix=X86 < %t
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; RUN: FileCheck %s -check-prefix=X86-GOT-EQUIV < %t
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; RUN: FileCheck %s -check-prefix=X86-NOGOT-EQUIV < %t
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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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; Check that these got equivalent symbols are never emitted.
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; X86-GOT-EQUIV-NOT: L_localgotequiv
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; X86-GOT-EQUIV-NOT: l_extgotequiv
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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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; X86: l_bargotequiv:
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; X86-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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%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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; X86: .long 5
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; X86-NOT: .long _localgotequiv-(_table+20)
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; X86-NEXT: .long _localfoo@GOTPCREL+4
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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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; X86: .long 5
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; X86-NOT: _extgotequiv-(_table+32)
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; X86-NEXT: .long _extfoo@GOTPCREL+4
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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.
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; X86: .long 5
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; X86-NOT: _extgotequiv-(_table+44)
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; X86-NEXT: .long _extfoo@GOTPCREL+28
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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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; X86-LABEL: _delta
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; X86: .long _extfoo@GOTPCREL+4
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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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; X86-LABEL: _deltaplus:
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; X86: .long _localfoo@GOTPCREL+59
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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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; Also test direct instruction uses.
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define i32** @t1() {
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ret i32** @bargotequiv
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}
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; Do not crash when a pattern cannot be matched as a GOT equivalent
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define void @foo() {
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; X86-NOGOT-EQUIV-LABEL: _foo:
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; X86-NOGOT-EQUIV: leaq _b(%rip), %rax
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store i8** @b, i8*** null
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ret void
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}
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@a = external global i8
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@b = internal unnamed_addr constant i8* @a
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; X86-NOGOT-EQUIV-LABEL: _c:
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; X86-NOGOT-EQUIV: .quad _b
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@c = global i8** @b
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