[llvm] r303904 - PPC: Correct Size for GETtlsADDR

[Kyle Butt via llvm-commits]

Author: iteratee
Date: Thu May 25 14:37:41 2017
New Revision: 303904

URL: http://llvm.org/viewvc/llvm-project?rev=303904&view=rev
Log:
PPC: Correct Size for GETtlsADDR

PPC::GETtlsADDR is lowered to a branch and a nop, by the assembly
printer. Its size was incorrectly marked as 4, correct it to 8. The
incorrect size can cause incorrect branch relaxation in
PPCBranchSelector under the right conditions.

Modified:
    llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td

Modified: llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td?rev=303904&r1=303903&r2=303904&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCInstr64Bit.td Thu May 25 14:37:41 2017
@@ -1001,7 +1001,9 @@ def ADDItlsgdL : Pseudo<(outs g8rc:$rD),
                  isPPC64;
 // LR8 is a true define, while the rest of the Defs are clobbers.  X3 is
 // explicitly defined when this op is created, so not mentioned here.
-let hasExtraSrcRegAllocReq = 1, hasExtraDefRegAllocReq = 1,
+// This is lowered to BL8_NOP_TLS by the assembly printer, so the size must be
+// correct because the branch select pass is relying on it.
+let hasExtraSrcRegAllocReq = 1, hasExtraDefRegAllocReq = 1, Size = 8,
     Defs = [X0,X4,X5,X6,X7,X8,X9,X10,X11,X12,LR8,CTR8,CR0,CR1,CR5,CR6,CR7] in
 def GETtlsADDR : Pseudo<(outs g8rc:$rD), (ins g8rc:$reg, tlsgd:$sym),
                         "#GETtlsADDR",