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| author | Chris Lattner <sabre@nondot.org> | 2006-11-20 20:48:05 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2006-11-20 20:48:05 +0000 |
| commit | e9c9f98f719cc597444181cd6634fac247f8f68c (patch) | |
| tree | 6cc509928c831b1952dca6e481db2f9d419fceb7 /lib/Target/PowerPC/PPCRegisterInfo.td | |
| parent | 0374248e86f66231ff5f07e6bce14e3dd67abd14 (diff) | |
| download | llvm-e9c9f98f719cc597444181cd6634fac247f8f68c.tar.gz llvm-e9c9f98f719cc597444181cd6634fac247f8f68c.tar.bz2 llvm-e9c9f98f719cc597444181cd6634fac247f8f68c.tar.xz | |
in ppc64-mode, don't allocate the 32-bit version of r13 either.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31884 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCRegisterInfo.td')
| -rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.td | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCRegisterInfo.td b/lib/Target/PowerPC/PPCRegisterInfo.td index 6c18e17eeb..51000f9a08 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.td +++ b/lib/Target/PowerPC/PPCRegisterInfo.td @@ -224,6 +224,12 @@ def GPRC : RegisterClass<"PPC", [i32], 32, } GPRCClass::iterator GPRCClass::allocation_order_end(const MachineFunction &MF) const { + // On PPC64, r13 is the thread pointer. Never allocate this register. + // Note that this is overconservative, as it also prevents allocation of + // R31 when the FP is not needed. + if (MF.getTarget().getSubtarget<PPCSubtarget>().isPPC64()) + return end()-5; // don't allocate R13, R31, R0, R1, LR + if (needsFP(MF)) return end()-4; // don't allocate R31, R0, R1, LR else |