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r251622 | vkalintiris | 2015-10-29 10:17:16 +0000 (Thu, 29 Oct 2015) | 17 lines
[mips] Check the register class before replacing materializations of zero with $zero in microMIPS.
Summary:
The microMIPS register class GPRMM16 does not contain the $zero register.
However, MipsSEDAGToDAGISel::replaceUsesWithZeroReg() would replace uses
of the $dst register:
[d]addiu, $dst, $zero, 0
with the $zero register, without checking for membership in the register
class of the target machine operand.
Reviewers: dsanders
Subscribers: llvm-commits, dsanders
Differential Revision: http://reviews.llvm.org/D13984
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_37@252158 91177308-0d34-0410-b5e6-96231b3b80d8
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