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Toma Tabacu 739ca842aa [mips] [IAS] Do not generate redundant move when expanding lw/sw with symbol. 
Summary:
Even though there is no 2nd register operand in the "lw/sw $8, symbol" case, we still try to find one, 
and we end up with $0, which makes us generate an unnecessary "addu $8, $8, $0" (a.k.a. "move $8, $8").

We can avoid this by checking if the 2nd register operand is different from $0, before generating the addu.

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8055

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234406 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-08 13:52:41 +00:00
autoconf Try to unbreak Clang build to export LLVM_ABI_BREAKING_CHECKS, fixup for r233310. 2015-04-01 11:46:15 +00:00
bindings IR: Remove MDTupleTypedArrayWrapper::operator MDTuple*() 2015-04-07 16:50:39 +00:00
cmake Disable all link optimizations in a debug build. 2015-04-06 15:04:31 +00:00
docs [lib/Fuzzer] show how to find Heartbleed with LibFuzzer 2015-04-08 06:16:11 +00:00
examples llvm/examples/BrainF: Give an explicit pointee type to ConstantExpr::getGetElementPtr(ty...), according to r233938. 2015-04-02 22:44:00 +00:00
include Don't repeat names in comments. NFC. 2015-04-08 13:52:09 +00:00
lib [mips] [IAS] Do not generate redundant move when expanding lw/sw with symbol. 2015-04-08 13:52:41 +00:00
projects
test [mips] [IAS] Do not generate redundant move when expanding lw/sw with symbol. 2015-04-08 13:52:41 +00:00
tools IR: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:18:49 +00:00
unittests IR: Remove MDTupleTypedArrayWrapper::operator MDTuple*() 2015-04-07 16:50:39 +00:00
utils Revert r234389. It really was needed but really should have been cstring instead of string.h 2015-04-08 06:03:17 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore
CMakeLists.txt Enable W4 warnings by default for MSVC builds 2015-04-07 19:01:01 +00:00
CODE_OWNERS.TXT
configure Try to unbreak Clang build to export LLVM_ABI_BREAKING_CHECKS, fixup for r233310. 2015-04-01 11:46:15 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in Try to unbreak Clang build to export LLVM_ABI_BREAKING_CHECKS, fixup for r233310. 2015-04-01 11:46:15 +00:00
Makefile.rules
README.txt Revert test commit at revision 233535. 2015-03-30 12:39:03 +00:00

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