From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Tue, 25 Nov 2014 07:53:06 +0000 (+0000)
Subject: R600/SI: Fix allocating flat_scr_lo / flat_scr_hi
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=87926dfe7efbb3f01ef6f71becce3837b758aac5

R600/SI: Fix allocating flat_scr_lo / flat_scr_hi

Only the super register flat_scr was marked as reserved,
so in some cases with high register usage it would still
try to allocate the subregisters.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222737 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/R600/SIRegisterInfo.cpp b/lib/Target/R600/SIRegisterInfo.cpp
index cffea129de9..5dc0f755f14 100644
--- a/lib/Target/R600/SIRegisterInfo.cpp
+++ b/lib/Target/R600/SIRegisterInfo.cpp
@@ -40,6 +40,8 @@ BitVector SIRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
 
   Reserved.set(AMDGPU::INDIRECT_BASE_ADDR);
   Reserved.set(AMDGPU::FLAT_SCR);
+  Reserved.set(AMDGPU::FLAT_SCR_LO);
+  Reserved.set(AMDGPU::FLAT_SCR_HI);
 
   // Reserve some VGPRs to use as temp registers in case we have to spill VGPRs
   Reserved.set(AMDGPU::VGPR255);