diff options
| author | Daniel Sanders <daniel.sanders@imgtec.com> | 2015-01-09 17:21:30 +0000 |
|---|---|---|
| committer | Daniel Sanders <daniel.sanders@imgtec.com> | 2015-01-09 17:21:30 +0000 |
| commit | 1440bb2a26ff13df1b29762658ee122cc0bc47ae (patch) | |
| tree | bd1540702f4a6f77010173a9988b1ab2f9ec389a /llvm/lib/Target/Mips/MipsISelLowering.h | |
| parent | 2ce8169ed3c8f49c3ae02c1fd10a684265c1dfcf (diff) | |
| download | bcm5719-llvm-1440bb2a26ff13df1b29762658ee122cc0bc47ae.tar.gz bcm5719-llvm-1440bb2a26ff13df1b29762658ee122cc0bc47ae.zip | |
[mips] Add support for accessing $gp as a named register.
Summary:
Mips Linux uses $gp to hold a pointer to thread info structure and accesses it
with a named register. This makes this work for LLVM.
The N32 ABI doesn't quite work yet since the frontend generates incorrect IR
for this case. It neglects to truncate the 64-bit GPR to a 32-bit value before
converting to a pointer. Given correct IR (as in the testcase in this patch),
it works correctly.
Reviewers: sstankovic, vmedic, atanasyan
Reviewed By: atanasyan
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D6893
llvm-svn: 225529
Diffstat (limited to 'llvm/lib/Target/Mips/MipsISelLowering.h')
| -rw-r--r-- | llvm/lib/Target/Mips/MipsISelLowering.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.h b/llvm/lib/Target/Mips/MipsISelLowering.h index 3254f1f1177..71f140b7a65 100644 --- a/llvm/lib/Target/Mips/MipsISelLowering.h +++ b/llvm/lib/Target/Mips/MipsISelLowering.h @@ -262,6 +262,8 @@ namespace llvm { void HandleByVal(CCState *, unsigned &, unsigned) const override; + unsigned getRegisterByName(const char* RegName, EVT VT) const override; + protected: SDValue getGlobalReg(SelectionDAG &DAG, EVT Ty) const; |
