--- Begin Message ---
Package: release.debian.org
Severity: normal
Tags: buster
User: release.debian.org@packages.debian.org
Usertags: pu
Hi,
This should fix the rustc's i386 and mips* builds. I tested the i386 part,
for mips* will have to see how it goes (and request assistance from the
porters if it's not enough).
Debdiff attached, and package uploaded.
Thanks,
Emilio
diff -Nru llvm-toolchain-7-7.0.1/debian/changelog llvm-toolchain-7-7.0.1/debian/changelog
--- llvm-toolchain-7-7.0.1/debian/changelog 2019-02-28 13:50:21.000000000 +0100
+++ llvm-toolchain-7-7.0.1/debian/changelog 2020-09-15 13:36:29.000000000 +0200
@@ -1,3 +1,11 @@
+llvm-toolchain-7 (1:7.0.1-8+deb10u1) buster; urgency=medium
+
+ * Non-maintainer upload.
+ * Fix for unordered cmpxchg instructions when building rustc.
+ * Disable nomadd4 instructions on mips*.
+
+ -- Emilio Pozuelo Monfort <pochu@debian.org> Tue, 15 Sep 2020 13:36:29 +0200
+
llvm-toolchain-7 (1:7.0.1-8) unstable; urgency=medium
* Fix a segfault in autopkgtest by brining
diff -Nru llvm-toolchain-7-7.0.1/debian/patches/AtomicExpand-Fix-a-crash-bug-when-lowering-unordered-loads.patch llvm-toolchain-7-7.0.1/debian/patches/AtomicExpand-Fix-a-crash-bug-when-lowering-unordered-loads.patch
--- llvm-toolchain-7-7.0.1/debian/patches/AtomicExpand-Fix-a-crash-bug-when-lowering-unordered-loads.patch 1970-01-01 01:00:00.000000000 +0100
+++ llvm-toolchain-7-7.0.1/debian/patches/AtomicExpand-Fix-a-crash-bug-when-lowering-unordered-loads.patch 2020-09-15 13:33:01.000000000 +0200
@@ -0,0 +1,28 @@
+From 2153c4b8281c1e5f25887ef9183947198c50a9d2 Mon Sep 17 00:00:00 2001
+From: Philip Reames <listmail@philipreames.com>
+Date: Tue, 19 Mar 2019 17:20:49 +0000
+Subject: [PATCH] [AtomicExpand] Fix a crash bug when lowering unordered loads
+ to cmpxchg
+
+Add tests for wider atomic loads and stores. In the process, fix a crasher where we appearently handled unorder stores, but not loads, when lowering to cmpxchg idioms.
+
+llvm-svn: 356482
+---
+ llvm/lib/CodeGen/AtomicExpandPass.cpp | 3 +
+ llvm/test/CodeGen/X86/atomic-unordered.ll | 234 +++++++++++++++++++---
+ 2 files changed, 213 insertions(+), 24 deletions(-)
+
+diff --git a/lib/CodeGen/AtomicExpandPass.cpp b/lib/CodeGen/AtomicExpandPass.cpp
+index 10dd21d1ef9d..7a8013abccfb 100644
+--- a/lib/CodeGen/AtomicExpandPass.cpp
++++ b/lib/CodeGen/AtomicExpandPass.cpp
+@@ -430,6 +430,9 @@ bool AtomicExpand::expandAtomicLoadToLL(LoadInst *LI) {
+ bool AtomicExpand::expandAtomicLoadToCmpXchg(LoadInst *LI) {
+ IRBuilder<> Builder(LI);
+ AtomicOrdering Order = LI->getOrdering();
++ if (Order == AtomicOrdering::Unordered)
++ Order = AtomicOrdering::Monotonic;
++
+ Value *Addr = LI->getPointerOperand();
+ Type *Ty = cast<PointerType>(Addr->getType())->getElementType();
+ Constant *DummyVal = Constant::getNullValue(Ty);
diff -Nru llvm-toolchain-7-7.0.1/debian/patches/mips-force-nomadd4.diff llvm-toolchain-7-7.0.1/debian/patches/mips-force-nomadd4.diff
--- llvm-toolchain-7-7.0.1/debian/patches/mips-force-nomadd4.diff 1970-01-01 01:00:00.000000000 +0100
+++ llvm-toolchain-7-7.0.1/debian/patches/mips-force-nomadd4.diff 2020-09-15 13:34:42.000000000 +0200
@@ -0,0 +1,18 @@
+The MIPS port aims to support the Loongson 3 family of CPUs in addition
+of the other MIPS CPUs. On the Loongson 3 family the MADD4 instructions
+are fused, while they are not fused on the other MIPS CPUs. In order to
+support both, we have to disabled those instructions.
+
+For that, the patch below basically corresponds to the --with-madd4=no
+used on the GCC side.
+
+--- a/clang/lib/Basic/Targets/Mips.h
++++ b/clang/lib/Basic/Targets/Mips.h
+@@ -306,6 +306,7 @@ public:
+ FloatABI = HardFloat;
+ DspRev = NoDSP;
+ HasFP64 = isFP64Default();
++ DisableMadd4 = true;
+
+ for (const auto &Feature : Features) {
+ if (Feature == "+single-float")
diff -Nru llvm-toolchain-7-7.0.1/debian/patches/series llvm-toolchain-7-7.0.1/debian/patches/series
--- llvm-toolchain-7-7.0.1/debian/patches/series 2019-02-28 13:49:26.000000000 +0100
+++ llvm-toolchain-7-7.0.1/debian/patches/series 2020-09-15 13:31:10.000000000 +0200
@@ -161,3 +161,5 @@
kfreebsd/lldb_source_Plugins_Process_FreeBSD.diff
kfreebsd/tools_llvm-shlib_CMakeLists.txt.diff
kfreebsd/include_llvm_MC_MCELFObjectWriter.h.diff
+AtomicExpand-Fix-a-crash-bug-when-lowering-unordered-loads.patch
+mips-force-nomadd4.diff
--- End Message ---