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[mips][dsp] Fix use without def on DSPCtrl registers read by rddsp intrinsic.

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Reviewers: sdardis

Subscribers: dsanders, sdardis, llvm-commits

Differential Revision: http://reviews.llvm.org/D21063

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272647 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders 2016-06-14 09:29:46 +00:00
parent 9cea6726d3
commit bd52e9f225
2 changed files with 4 additions and 2 deletions
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3
lib/Target/Mips/MipsSEISelDAGToDAG.cpp
View File

@ -47,7 +47,8 @@ void MipsSEDAGToDAGISel::addDSPCtrlRegOperands(bool IsDef, MachineInstr &MI,
MachineFunction &MF) {
MachineInstrBuilder MIB(MF, &MI);
unsigned Mask = MI.getOperand(1).getImm();
unsigned Flag = IsDef ? RegState::ImplicitDefine : RegState::Implicit;
unsigned Flag =
IsDef ? RegState::ImplicitDefine : RegState::Implicit | RegState::Undef;
if (Mask & 1)
MIB.addReg(Mips::DSPPos, Flag);

3
test/CodeGen/Mips/dsp-r1.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -march=mipsel -mcpu=mips32 -mattr=+dsp < %s | FileCheck %s
; RUN: llc -march=mipsel -mcpu=mips32 -mattr=+dsp -verify-machineinstrs < %s | \
; RUN: FileCheck %s
define i32 @test__builtin_mips_extr_w1(i32 %i0, i32, i64 %a0) nounwind {
entry: