nickdesaulniers

typedef unsigned short __u16;
typedef __u16 u16;
enum { false, true };
typedef _Bool bool;
typedef struct qspinlock {
        struct {
                struct {
                        u16 tail;
                };
        };

nickdesaulniers

diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h
index 84b87538a15d..92acef97d8ed 100644
--- a/arch/x86/include/asm/bug.h
+++ b/arch/x86/include/asm/bug.h
@@ -75,9 +75,11 @@ do {                                                         \
  */
 #define __WARN_FLAGS(flags)                                    \
 do {                                                           \
+       __label__ reachable; \
        instrumentation_begin();                                \

nickdesaulniers

diff --git a/clang/lib/Driver/ToolChains/Arch/ARM.cpp b/clang/lib/Driver/ToolChains/Arch/ARM.cpp
index 4013cf230026..400b7fafd6d7 100644
--- a/clang/lib/Driver/ToolChains/Arch/ARM.cpp
+++ b/clang/lib/Driver/ToolChains/Arch/ARM.cpp
@@ -160,26 +160,44 @@ bool arm::isHardTPSupported(const llvm::Triple &Triple) {
 // Select mode for reading thread pointer (-mtp=soft/cp15).
 arm::ReadTPMode arm::getReadTPMode(const Driver &D, const ArgList &Args,
                                    const llvm::Triple &Triple, bool ForAS) {
+  // Default to Soft.
+  ReadTPMode Mode = ReadTPMode::Soft;

nickdesaulniers

diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index d6ee6a9d6525..4ca72f819301 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -546,11 +546,13 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
   setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
   setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
   setOperationAction(ISD::BlockAddress,  MVT::i32, Custom);
+  setOperationAction(ISD::TargetBlockAddress,  MVT::i32, Custom);
   setOperationAction(ISD::ConstantPool,  MVT::i32, Custom);

nickdesaulniers

#!/usr/bin/env sh
# Usage: ./measure_30.sh 'code to measure' 'setup code not to measure'
tempfile=$(mktemp)
count=30
for i in $(seq 1 $count); do
  eval $2
  perf stat -B -e cycles:u $1 2>&1 1>/dev/null  | grep cycles:u | awk '{ $1=$1 };1' | cut -d ' ' -f 1 | tr -d , | tee --append $tempfile
done
total=0
for i in $(awk '{ print $1; }' $tempfile); do

nickdesaulniers

unsigned long strnlen(const char *, unsigned long);
void fortify_panic(const char *);

extern inline __attribute__((always_inline, unused))
__attribute__((no_instrument_function)) __attribute__((always_inline))
__attribute__((gnu_inline))
unsigned long
strlen(const char *p)
{
        unsigned long ret;

nickdesaulniers

long hweight_long_w;
amd_numa_init_nb, amd_numa_init_base, amd_numa_init_limit;
static hweight_long() {
  return __builtin_constant_p(hweight_long_w)
             ? (hweight_long_w & 1) + hweight_long_w + !(hweight_long_w & 2) +
                               !(hweight_long_w & 3) + !!(hweight_long_w & 4) +
                               !!hweight_long_w
                           << !(hweight_long_w << 6) +
                                  !(hweight_long_w & 1 << 7 + hweight_long_w) +
                                  !(hweight_long_w >> 1 << hweight_long_w >>

nickdesaulniers

diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
index 0bba2add1c92..a491b76e4367 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
@@ -371,7 +371,10 @@ public:
   }
 
   void changeSection(MCSection *Section, const MCExpr *Subsection) override {
-    LastMappingSymbols[getCurrentSection().first] = std::move(LastEMSInfo);
+    llvm::MCSection *Current = getCurrentSection().first;

nickdesaulniers

# $ arm-linux-gnueabi-as -mthumb -march=armv7-a foo.s -o foo.o
# $ clang --target=arm-linux-gnueabi -Wa,-mthumb -Wa,-march=armv7-a -c foo.s

.syntax unified

.globl v7wbi_flush_kern_tlb_range
.align 0
v7wbi_flush_kern_tlb_range:
  bx      lr
.type v7wbi_flush_kern_tlb_range, %function

nickdesaulniers

+ timeout --foreground 3m unbuffer qemu-system-arm -initrd /android1/boot-utils/images/arm/rootfs.cpio -append 'console=ttyAMA0 earlycon' -machine virt -no-reboot -display none -kernel /android0/kernel-all/arch/arm/boot/zImage -m 512m -nodefaults -serial mon:stdio
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 5.15.0-rc1-00016-g4402e1c6209f (ndesaulniers@ndesaulniers1.mtv.corp.google.com) (Nick Desaulniers clang version 14.0.0 (git@github.com:llvm/llvm-project.git 0a7b8cc5dd8efadeef07bf6e4e93c7df2ebe7220), LLD 14.0.0) #38 SMP Tue Sep 14 17:40:09 PDT 2021
[    0.000000] CPU: ARMv7 Processor [412fc0f1] revision 1 (ARMv7), cr=50c5387d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[    0.000000] OF: fdt: Machine model: linux,dummy-virt
[    0.000000] earlycon: pl11 at MMIO 0x09000000 (options '')
[    0.000000] printk: bootconsole [pl11] enabled
[    0.000000] Memory policy: Data