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llvm-mirror/test/LTO/symver-asm.ll
Tom Roeder deee9e4afd This patch fixes LTO's RecordStreamer so that it records symbols in the MCExpr
part of an asm .symver directive as being used. This prevents referenced
functions from being internalized and deleted.

Without the patch to LTOModule.cpp, the test case will produce the error:

LLVM ERROR: A @@ version cannot be undefined.

llvm-svn: 205221
2014-03-31 16:59:13 +00:00

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501 B
LLVM

; RUN: llvm-as < %s >%t1
; RUN: llvm-lto -o %t2 %t1
; RUN: llvm-nm %t2 | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
module asm ".symver io_cancel_0_4,io_cancel@@LIBAIO_0.4"
; Even without -exported-symbol, io_cancel_0_4 should be noticed by LTOModule's
; RecordStreamer, so it shouldn't get eliminated. However, the object file will
; contain the aliased symver as well as the original.
define i32 @io_cancel_0_4() {
; CHECK: io_cancel@@LIBAIO_0.4
; CHECK: io_cancel_0_4
ret i32 0
}