derek.holloway
7502bf64a4
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32 lines
1017 B
LLVM
32 lines
1017 B
LLVM
; RUN: llc %s -o - -O0 -regalloc=fast | FileCheck %s
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target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128"
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target triple = "i386-apple-macosx10.10"
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@c = external global i8, align 1
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@p = thread_local global ptr null, align 4
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; Check that regalloc fast correctly preserves EAX that is set by the TLS call
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; until the actual use.
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; PR26485.
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;
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; CHECK-LABEL: f:
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; Get c.
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; C is spilled because of the scheduling of the instructions,
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; but a smarter regalloc wouldn't have spilled it.
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; CHECK: movl L_c{{[^,]*}}, [[C_ADDR:%[a-z]+]]
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; CHECK-NEXT: movl [[C_ADDR]], [[C_SPILLED:[0-8]+\(%esp\)]]
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; Get p.
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; CHECK-NEXT: movl _p@{{[0-9a-zA-Z]+}}, [[P_ADDR:%[a-z]+]]
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; CHECK-NEXT: calll *([[P_ADDR]])
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; At this point eax contiains the address of p.
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; Load c address.
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; Make sure we do not clobber eax.
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; CHECK-NEXT: movl [[C_SPILLED]], [[C_ADDR_RELOADED:%e[b-z]x+]]
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; Store c address into p.
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; CHECK-NEXT: movl [[C_ADDR_RELOADED]], (%eax)
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define void @f() #0 {
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entry:
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store ptr @c, ptr @p, align 4
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ret void
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}
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