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