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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-26 18:52:33 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-26 18:52:33 +0000 |
| commit | c9e5015dece0a1a73bec358e11bc87594831279d (patch) | |
| tree | 2536ec8e3e79a76982d4f03238684978ea691682 /lib/Target/X86/X86RegisterInfo.h | |
| parent | efa81404a52020652c4c06499acc29af547b1392 (diff) | |
| download | llvm-c9e5015dece0a1a73bec358e11bc87594831279d.tar.gz llvm-c9e5015dece0a1a73bec358e11bc87594831279d.tar.bz2 llvm-c9e5015dece0a1a73bec358e11bc87594831279d.tar.xz | |
Add a TRI::getLargestLegalSuperClass hook to provide an upper limit on register class inflation.
The hook will be used by the register allocator when recomputing register
classes after removing constraints.
Thumb1 code doesn't allow anything larger than tGPR, and x86 needs to ensure
that the spill size doesn't change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130228 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86RegisterInfo.h')
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.h b/lib/Target/X86/X86RegisterInfo.h index cccddfadd1..9970c52c3e 100644 --- a/lib/Target/X86/X86RegisterInfo.h +++ b/lib/Target/X86/X86RegisterInfo.h @@ -91,6 +91,9 @@ public: getMatchingSuperRegClass(const TargetRegisterClass *A, const TargetRegisterClass *B, unsigned Idx) const; + const TargetRegisterClass* + getLargestLegalSuperClass(const TargetRegisterClass *RC) const; + /// getPointerRegClass - Returns a TargetRegisterClass used for pointer /// values. const TargetRegisterClass *getPointerRegClass(unsigned Kind = 0) const; |