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llvm9: add fixes for the powerpc backend

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This fixes Rust with llvm9 on ppc32, so that we can finally switch
to it (llvm-006-bigpic.patch) - previously it would emit wrong
executables that segfault.

While at it, I'm adding an upstream backport that fixes incorrect
codegen for certain things such as Chromium.

[ci skip]
This commit is contained in:
q66 2019-11-03 18:49:26 +01:00 • committed by Helmut Pozimski
parent 73c2c112e0
commit 3b9debee1c
3 changed files with 73 additions and 1 deletions
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34
srcpkgs/llvm9/files/patches/llvm/llvm-005-ppc-lrint.patch Normal file
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@ -0,0 +1,34 @@
From 97e36260709c541044f30092b420238511e13e5b Mon Sep 17 00:00:00 2001
From: Nemanja Ivanovic <nemanjai@ca.ibm.com>
Date: Mon, 28 Oct 2019 16:08:30 -0500
Subject: [PATCH] [PowerPC] Do not emit HW loop if the body contains calls to
lrint/lround
These two intrinsics are lowered to calls so should prevent the formation of
CTR loops. In a subsequent patch, we will handle all currently known intrinsics
and prevent the formation of HW loops if any unknown intrinsics are encountered.
Differential revision: https://reviews.llvm.org/D68841
---
.../Target/PowerPC/PPCTargetTransformInfo.cpp | 4 +
llvm/test/CodeGen/PowerPC/pr43527.ll | 75 +++++++++++++++++++
2 files changed, 79 insertions(+)
create mode 100644 llvm/test/CodeGen/PowerPC/pr43527.ll
diff --git a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
index 53c2f0f88d14..ad37e435fa36 100644
--- llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
+++ llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
@@ -331,8 +331,12 @@ bool PPCTTIImpl::mightUseCTR(BasicBlock *BB,
case Intrinsic::ceil: Opcode = ISD::FCEIL; break;
case Intrinsic::trunc: Opcode = ISD::FTRUNC; break;
case Intrinsic::rint: Opcode = ISD::FRINT; break;
+ case Intrinsic::lrint: Opcode = ISD::LRINT; break;
+ case Intrinsic::llrint: Opcode = ISD::LLRINT; break;
case Intrinsic::nearbyint: Opcode = ISD::FNEARBYINT; break;
case Intrinsic::round: Opcode = ISD::FROUND; break;
+ case Intrinsic::lround: Opcode = ISD::LROUND; break;
+ case Intrinsic::llround: Opcode = ISD::LLROUND; break;
case Intrinsic::minnum: Opcode = ISD::FMINNUM; break;
case Intrinsic::maxnum: Opcode = ISD::FMAXNUM; break;
case Intrinsic::umul_with_overflow: Opcode = ISD::UMULO; break;

38
srcpkgs/llvm9/files/patches/llvm/llvm-006-ppc-bigpic.patch Normal file
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@ -0,0 +1,38 @@
From f3dbdd49c06bfafc1d6138094cf42889c14d38b6 Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
Date: Sun, 3 Nov 2019 10:57:27 -0600
Subject: [PATCH] [LLVM][PowerPC] Assume BigPIC if no PIC level is specified
---
llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp | 2 +-
llvm/lib/Target/PowerPC/PPCMCInstLower.cpp | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp b/llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
index 269b84b4e8d..03246a5242c 100644
--- llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -488,7 +488,7 @@ void PPCAsmPrinter::EmitTlsCall(const MachineInstr *MI,
// Add 32768 offset to the symbol so we follow up the latest GOT/PLT ABI.
if (Kind == MCSymbolRefExpr::VK_PLT && Subtarget->isSecurePlt() &&
- M->getPICLevel() == PICLevel::BigPIC)
+ M->getPICLevel() != PICLevel::SmallPIC)
TlsRef = MCBinaryExpr::createAdd(
TlsRef, MCConstantExpr::create(32768, OutContext), OutContext);
const MachineOperand &MO = MI->getOperand(2);
diff --git a/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp b/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp
index 027e6bd1ba0..ae461f4eea9 100644
--- llvm/lib/Target/PowerPC/PPCMCInstLower.cpp
+++ llvm/lib/Target/PowerPC/PPCMCInstLower.cpp
@@ -116,7 +116,7 @@ static MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol,
const MCExpr *Expr = MCSymbolRefExpr::create(Symbol, RefKind, Ctx);
// If -msecure-plt -fPIC, add 32768 to symbol.
if (Subtarget->isSecurePlt() && TM.isPositionIndependent() &&
- M->getPICLevel() == PICLevel::BigPIC &&
+ M->getPICLevel() != PICLevel::SmallPIC &&
MO.getTargetFlags() == PPCII::MO_PLT)
Expr =
MCBinaryExpr::createAdd(Expr, MCConstantExpr::create(32768, Ctx), Ctx);
--
2.23.0

2
srcpkgs/llvm9/template
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@ -1,7 +1,7 @@
# Template file for 'llvm9'
pkgname=llvm9
version=9.0.0
revision=2
revision=3
wrksrc="llvm-${version}.src"
build_style=cmake
configure_args="