Simon Dardis ea3431598e [mips] Correct tail call encoding for MIPSR6
r277708 enabled tails calls for MIPS but used the 'jr' instruction when the 
jump target was held in a register. For MIPSR6, 'jalr $zero, $reg' should
have been used. Additionally, add missing patterns for external and global
symbols for tail calls.

Reviewers: dsanders, vkalintiris

Differential Review: https://reviews.llvm.org/D23301

llvm-svn: 279064
2016-08-18 13:22:43 +00:00
2016-08-17 20:02:11 +00:00
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