R600: Fix R600ControlFlowFinalizer not considering VTX_READ 128 bit dst reg
Patch by: Vincent Lejeune
https://bugs.freedesktop.org/show_bug.cgi?id=64877
NOTE: This is a candidate for the 3.3 branch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182600 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/R600/R600ControlFlowFinalizer.cpp b/lib/Target/R600/R600ControlFlowFinalizer.cpp
index d447f08..832c375 100644
--- a/lib/Target/R600/R600ControlFlowFinalizer.cpp
+++ b/lib/Target/R600/R600ControlFlowFinalizer.cpp
@@ -117,8 +117,15 @@
const MachineOperand &MO = *I;
if (!MO.isReg())
continue;
- if (MO.isDef())
- DstMI = MO.getReg();
+ if (MO.isDef()) {
+ unsigned Reg = MO.getReg();
+ if (AMDGPU::R600_Reg128RegClass.contains(Reg))
+ DstMI = Reg;
+ else
+ DstMI = TRI.getMatchingSuperReg(Reg,
+ TRI.getSubRegFromChannel(TRI.getHWRegChan(Reg)),
+ &AMDGPU::R600_Reg128RegClass);
+ }
if (MO.isUse()) {
unsigned Reg = MO.getReg();
if (AMDGPU::R600_Reg128RegClass.contains(Reg))