Commit Graph

2 Commits

Author SHA1 Message Date
Vasileios Kalintiris 3955b75ba9 [mips][FastISel] Instantiate the MipsFastISel class only for targets that support FastISel.
Summary:
Instead of instantiating the MipsFastISel class and checking if the
target is supported in the overriden methods, we should perform that
check before creating the class. This allows us to enable FastISel *only*
for targets that truly support it, ie. MIPS32 to MIPS32R5.

Reviewers: sdardis

Subscribers: ehostunreach, llvm-commits

Differential Revision: https://reviews.llvm.org/D24824

llvm-svn: 284475
2016-10-18 13:05:42 +00:00
Simon Dardis b432a3ed7e [mips] Tighten FastISel restrictions
LLVM PR/29052 highlighted that FastISel for MIPS attempted to lower
arguments assuming that it was using the paired 32bit registers to
perform operations for f64. This mode of operation is not supported
for MIPSR6.

This patch resolves the reported issue by adding additional checks
for unsupported floating point unit configuration.

Thanks to mike.k for reporting this issue!

Reviewers: seanbruno, vkalintiris

Differential Review: https://reviews.llvm.org/D23795

llvm-svn: 280706
2016-09-06 12:36:24 +00:00