diff options
| author | Eric Christopher <echristo@apple.com> | 2011-12-01 08:12:41 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@apple.com> | 2011-12-01 08:12:41 +0000 |
| commit | 7d5a61e975260d01bb2079b5dcb9c93b76a4734d (patch) | |
| tree | 8a61a999a51368391703a6fb28ab407b57d71e55 /lib | |
| parent | 0becc96b243da058f6d8901128b173d192db5148 (diff) | |
For 64-bit the rest of the general regs are ok for the q constraint. Make
sure we can emit both the high and low versions of those registers.
Fixes rdar://10392864
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145579 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index c1ac9f3431..9d7863c6ba 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -665,7 +665,7 @@ unsigned getX86SubSuperRegister(unsigned Reg, EVT VT, bool High) { case MVT::i8: if (High) { switch (Reg) { - default: return 0; + default: return getX86SubSuperRegister(Reg, MVT::i64, High); case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX: return X86::AH; case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX: @@ -785,6 +785,22 @@ unsigned getX86SubSuperRegister(unsigned Reg, EVT VT, bool High) { return X86::R15D; } case MVT::i64: + // For 64-bit mode if we've requested a "high" register and the + // Q or r constraints we want one of these high registers or + // just the register name otherwise. + if (High) { + switch (Reg) { + case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI: + return X86::SI; + case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI: + return X86::DI; + case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP: + return X86::BP; + case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP: + return X86::SP; + // Fallthrough. + } + } switch (Reg) { default: return Reg; case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX: |