[PowerPC] Rework TLS call operand processing

As part of the global-dynamic and local-dynamic TLS sequences, we need
to use a special form of the call instruction:

 bl __tls_get_addr(sym@tlsld)
 bl __tls_get_addr(sym@tlsgd)

which generates two fixups.  The current implementation of this causes
problems with recognizing this form in the asm parser.  To fix this,
this patch reworks operand processing for this special form by using
a single operand to hold both __tls_get_addr and sym@tlsld and defining
a print method to output the above form, and an encoding method to
generate the two fixups.

As a side simplification, the patch replaces the two instruction
patterns BL8_NOP_TLSGD and BL8_NOP_TLSLD by a single BL8_NOP_TLS,
since the patterns already operate in an identical fashion (whether
we have a local-dynamic or global-dynamic symbol is already encoded
in the symbol modifier).

No change in code generation intended.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185477 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCCodeEmitter.cpp b/lib/Target/PowerPC/PPCCodeEmitter.cpp
index 382d709afa..3c7a2855b4 100644
--- a/lib/Target/PowerPC/PPCCodeEmitter.cpp
+++ b/lib/Target/PowerPC/PPCCodeEmitter.cpp
@@ -71,6 +71,7 @@ namespace {
     unsigned getMemRIEncoding(const MachineInstr &MI, unsigned OpNo) const;
     unsigned getMemRIXEncoding(const MachineInstr &MI, unsigned OpNo) const;
     unsigned getTLSRegEncoding(const MachineInstr &MI, unsigned OpNo) const;
+    unsigned getTLSCallEncoding(const MachineInstr &MI, unsigned OpNo) const;
 
     const char *getPassName() const { return "PowerPC Machine Code Emitter"; }
 
@@ -263,6 +264,11 @@ unsigned PPCCodeEmitter::getTLSRegEncoding(const MachineInstr &MI,
   return 0;
 }
 
+unsigned PPCCodeEmitter::getTLSCallEncoding(const MachineInstr &MI,
+                                            unsigned OpNo) const {
+  llvm_unreachable("TLS not supported on the old JIT.");
+  return 0;
+}
 
 unsigned PPCCodeEmitter::getMachineOpValue(const MachineInstr &MI,
                                            const MachineOperand &MO) const {