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Marcin Koscielnicki 9ebfa4db3c [AArch64] [ARM] Make a target-independent llvm.thread.pointer intrinsic.

Both AArch64 and ARM support llvm.<arch>.thread.pointer intrinsics that
just return the thread pointer.  I have a pending patch that does the same
for SystemZ (D19054), and there are many more targets that could benefit
from one.

This patch merges the ARM and AArch64 intrinsics into a single target
independent one that will also be used by subsequent targets.

Differential Revision: http://reviews.llvm.org/D19098

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266818 91177308-0d34-0410-b5e6-96231b3b80d8

2016-04-19 20:51:05 +00:00

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LLVM

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 ; RUN: llc < %s -march=arm -mtriple=arm-linux-gnueabi | \
 ; RUN:     grep "__aeabi_read_tp"
 define i8* @test() {
 entry:
 	%tmp1 = call i8* @llvm.thread.pointer( )		; <i8*> [#uses=0]
 	ret i8* %tmp1
 }
 declare i8* @llvm.thread.pointer()