Date: Mon, 26 Jan 2015 21:17:15 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r277774 - head/contrib/llvm/lib/Target/AArch64 Message-ID: <201501262117.t0QLHF14072352@svn.freebsd.org>
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Author: dim Date: Mon Jan 26 21:17:14 2015 New Revision: 277774 URL: https://svnweb.freebsd.org/changeset/base/277774 Log: Pull in r226664 from upstream llvm trunk (by Tim Northover): AArch64: add backend option to reserve x18 (platform register) AAPCS64 says that it's up to the platform to specify whether x18 is reserved, and a first step on that way is to add a flag controlling it. From: Andrew Turner <andrew@fubar.geek.nz> Requested by: andrew Modified: head/contrib/llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp Modified: head/contrib/llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp ============================================================================== --- head/contrib/llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp Mon Jan 26 19:42:39 2015 (r277773) +++ head/contrib/llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp Mon Jan 26 21:17:14 2015 (r277774) @@ -33,6 +33,10 @@ using namespace llvm; #define GET_REGINFO_TARGET_DESC #include "AArch64GenRegisterInfo.inc" +static cl::opt<bool> +ReserveX18("aarch64-reserve-x18", cl::Hidden, + cl::desc("Reserve X18, making it unavailable as GPR")); + AArch64RegisterInfo::AArch64RegisterInfo(const AArch64InstrInfo *tii, const AArch64Subtarget *sti) : AArch64GenRegisterInfo(AArch64::LR), TII(tii), STI(sti) {} @@ -90,7 +94,7 @@ AArch64RegisterInfo::getReservedRegs(con Reserved.set(AArch64::W29); } - if (STI->isTargetDarwin()) { + if (STI->isTargetDarwin() || ReserveX18) { Reserved.set(AArch64::X18); // Platform register Reserved.set(AArch64::W18); } @@ -117,7 +121,7 @@ bool AArch64RegisterInfo::isReservedReg( return true; case AArch64::X18: case AArch64::W18: - return STI->isTargetDarwin(); + return STI->isTargetDarwin() || ReserveX18; case AArch64::FP: case AArch64::W29: return TFI->hasFP(MF) || STI->isTargetDarwin(); @@ -379,7 +383,7 @@ unsigned AArch64RegisterInfo::getRegPres case AArch64::GPR64commonRegClassID: return 32 - 1 // XZR/SP - (TFI->hasFP(MF) || STI->isTargetDarwin()) // FP - - STI->isTargetDarwin() // X18 reserved as platform register + - (STI->isTargetDarwin() || ReserveX18) // X18 reserved as platform register - hasBasePointer(MF); // X19 case AArch64::FPR8RegClassID: case AArch64::FPR16RegClassID:
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