Preventing MapEndpointToNode from changing argument

Preventing MapEndpointToNode from changing argument

Signed-off-by: Thomas Graf <thomas@cilium.io>

When the allocation CIDR changes, the existing code errored out. When that
happened on the first agent restart, all existing endpoints failed to restore
due to failure to allocate the existing endpoint's IP address. The failure to
restore would then in turn get all existing endpoints deleted.

This is bad in two ways:

1. It causes all endpoints to be removed, causing the pods to restart
2. It does not allow the agent to ever come up again without intervention from
   the user.

This commit solves problem #2 to allow nodes to recover automatically. It does
not solve problem #1 yet and requires pods to restart.

Solving problem #2 only makes sense once we have isolated all datapath aspects
such as the DNS proxy and L7 proxies out of the agent as endpoint connetivity
cannot be guaranteed if the agent cannot come up within a reasonable amount of
time.

Fixes: #6215

Signed-off-by: Thomas Graf <thomas@cilium.io>

When the allocation CIDR changes, the existing code errored out. When that
happened on the first agent restart, all existing endpoints failed to restore
due to failure to allocate the existing endpoint's IP address. The failure to
restore would then in turn get all existing endpoints deleted.

This is bad in two ways:

1. It causes all endpoints to be removed, causing the pods to restart
2. It does not allow the agent to ever come up again without intervention from
   the user.

This commit solves problem #2 to allow nodes to recover automatically. It does
not solve problem #1 yet and requires pods to restart.

Solving problem #2 only makes sense once we have isolated all datapath aspects
such as the DNS proxy and L7 proxies out of the agent as endpoint connetivity
cannot be guaranteed if the agent cannot come up within a reasonable amount of
time.

Fixes: #6215

Signed-off-by: Thomas Graf <thomas@cilium.io>

[ upstream commit 0b3ed95 ]

When the allocation CIDR changes, the existing code errored out. When that
happened on the first agent restart, all existing endpoints failed to restore
due to failure to allocate the existing endpoint's IP address. The failure to
restore would then in turn get all existing endpoints deleted.

This is bad in two ways:

1. It causes all endpoints to be removed, causing the pods to restart
2. It does not allow the agent to ever come up again without intervention from
   the user.

This commit solves problem #2 to allow nodes to recover automatically. It does
not solve problem #1 yet and requires pods to restart.

Solving problem #2 only makes sense once we have isolated all datapath aspects
such as the DNS proxy and L7 proxies out of the agent as endpoint connetivity
cannot be guaranteed if the agent cannot come up within a reasonable amount of
time.

Fixes: #6215

Signed-off-by: Thomas Graf <thomas@cilium.io>
Signed-off-by: Ian Vernon <ian@cilium.io>

[ upstream commit 0b3ed95 ]

When the allocation CIDR changes, the existing code errored out. When that
happened on the first agent restart, all existing endpoints failed to restore
due to failure to allocate the existing endpoint's IP address. The failure to
restore would then in turn get all existing endpoints deleted.

This is bad in two ways:

1. It causes all endpoints to be removed, causing the pods to restart
2. It does not allow the agent to ever come up again without intervention from
   the user.

This commit solves problem #2 to allow nodes to recover automatically. It does
not solve problem #1 yet and requires pods to restart.

Solving problem #2 only makes sense once we have isolated all datapath aspects
such as the DNS proxy and L7 proxies out of the agent as endpoint connetivity
cannot be guaranteed if the agent cannot come up within a reasonable amount of
time.

Fixes: #6215

Signed-off-by: Thomas Graf <thomas@cilium.io>
Signed-off-by: Ian Vernon <ian@cilium.io>

# This is the 1st commit message:

chore: fixing empty pod fields in endpoint logger

Signed-off-by: vakr <vakr@microsoft.com>

# This is the commit message cilium#2:

Correcting comment

Signed-off-by: vakr <vakr@microsoft.com>

Signed-off-by: Marco Hofstetter <marco.hofstetter@isovalent.com>

Signed-off-by: Rui Cao <caorui.io@bytedance.com>

Signed-off-by: Igor Klemenski <igor.klemenski@microsoft.com>

Signed-off-by: Marco Hofstetter <marco.hofstetter@isovalent.com>

Signed-off-by: Marco Hofstetter <marco.hofstetter@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 cilium#1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 cilium#2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 cilium#3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 cilium#4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 cilium#5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 cilium#6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 cilium#7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 cilium#8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 cilium#9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 cilium#1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 cilium#2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 cilium#3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 cilium#4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 cilium#5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 cilium#6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 cilium#7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 cilium#8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 cilium#9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 cilium#1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 cilium#2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 cilium#3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 cilium#4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 cilium#5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 cilium#6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 cilium#7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 cilium#8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 cilium#9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 cilium#1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 cilium#2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 cilium#3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 cilium#4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 cilium#5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 cilium#6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 cilium#7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 cilium#8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 cilium#9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 cilium#1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 cilium#2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 cilium#3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 cilium#4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 cilium#5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 cilium#6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 cilium#7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 cilium#8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 cilium#9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 cilium#1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 cilium#2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 cilium#3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 cilium#4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 cilium#5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 cilium#6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 cilium#7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 cilium#8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 cilium#9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 #1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 #2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 #3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 #4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 #5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 #6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 #7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 #8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 #9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>

Running all memmove tests in a single function made clang backend
crash (`Branch target out of insn range`).

It doesn't seem to correlate with a single test. Commenting from test
everything after:

```
test___builtin_memmove5_single(48);
```

Makes the test compile and pass. Inverting the selection, and only running
`test___builtin_memmove5_single(50);` to `test___builtin_memmove5_single(128);`
also makes the test compile & pass.

Split `test_builtin_memmove` into two to work-around.

Note: Unsure how we can report this to CLANG in a simple repro, given that it
seems to be "additive".

---

Details:

```
fatal error: error in backend: Branch target out of insn range
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -I/home/user/dev/cilium2/bpf -I/home/user/dev/cilium2/bpf/include -g -O2 --target=bpf -std=gnu99 -nostdinc -ftrap-function=__undefined_trap -Wall -Wextra -Werror -Wshadow -Wno-address-of-packed-member -Wno-unknown-warning-option -Wno-gnu-variable-sized-type-not-at-end -Wimplicit-int-conversion -Wenum-conversion -Wimplicit-fallthrough -MD -mcpu=v3 -c builtins.c -o builtins.o
1.	<eof> parser at end of file
2.	Code generation
 #0 0x00007211191a63bf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
 cilium#1 0x00007211191a44f9 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:106:18
 cilium#2 0x00007211190efff3 build-llvm/tools/clang/stage2-bins/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 cilium#3 0x00007211190effa2 (/usr/lib/llvm-18/bin/../lib/libLLVM.so.18.1+0xceffa2)
 cilium#4 0x00007211191a0c70 llvm::sys::Process::Exit(int, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Process.cpp:102:5
 cilium#5 0x000055d222d2891b (/usr/lib/llvm-18/bin/clang+0x1491b)
 cilium#6 0x00007211190fe01c _M_data /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:223:28
 cilium#7 0x00007211190fe01c _M_is_local /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:264:6
 cilium#8 0x00007211190fe01c _M_dispose /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:282:7
 cilium#9 0x00007211190fe01c ~basic_string /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/basic_string.h:804:9
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Ubuntu clang version 18.1.3 (1ubuntu1)
Target: bpf
Thread model: posix
InstalledDir: /usr/bin
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg: /tmp/builtins-eae2ef.c
clang: note: diagnostic msg: /tmp/builtins-eae2ef.sh
clang: note: diagnostic msg:

********************
```

Signed-off-by: Marc Suñé <marc.sune@isovalent.com>