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[PowerPC] Add support for llvm.thread.pointer

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Differential Revision: http://reviews.llvm.org/D19304

llvm-svn: 267546
This commit is contained in:
Marcin Koscielnicki 2016-04-26 10:37:22 +00:00
parent 599068857b
commit 704c818d77
2 changed files with 27 additions and 0 deletions
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10
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -7715,6 +7715,16 @@ static bool getVectorCompareInfo(SDValue Intrin, int &CompareOpc,
/// lower, do it, otherwise return null.
SDValue PPCTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
SelectionDAG &DAG) const {
unsigned IntrinsicID =
cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
if (IntrinsicID == Intrinsic::thread_pointer) {
// Reads the thread pointer register, used for __builtin_thread_pointer.
bool is64bit = Subtarget.isPPC64();
return DAG.getRegister(is64bit ? PPC::X13 : PPC::R2,
is64bit ? MVT::i64 : MVT::i32);
}
// If this is a lowered altivec predicate compare, CompareOpc is set to the
// opcode number of the comparison.
SDLoc dl(Op);

17
test/CodeGen/PowerPC/thread-pointer.ll Normal file
View File

@ -0,0 +1,17 @@
; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu | FileCheck %s --check-prefix=CHECK-32
; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s --check-prefix=CHECK-64
; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s --check-prefix=CHECK-64
; Function Attrs: nounwind readnone
declare i8* @llvm.thread.pointer() #1
define i8* @thread_pointer() {
; CHECK-32-LABEL: @thread_pointer
; CHECK-32: mr 3, 2
; CHECK-32: blr
; CHECK-64-LABEL: @thread_pointer
; CHECK-64: mr 3, 13
; CHECK-64: blr
%1 = tail call i8* @llvm.thread.pointer()
ret i8* %1
}