LLVM 15 regression: LLVM ERROR: cannot select when lowering "vector @splat" behavior test

[andrewrk]

    LLVM ERROR: Cannot select: 0x7fbada5323a8: v8f16,ch = X86ISD::VBROADCAST_LOAD<(load (s16) from constant-pool)> 0x7fbae24e8678, 0x7fbae36d3cd0, behavior/vector.zig:252:18 @[ behavior/vector.zig:261:25 @[ behavior/vector.zig:283:20 ] ]
      0x7fbae36d3cd0: i64 = X86ISD::WrapperRIP TargetConstantPool:i64<half 0xH4248> 0
        0x7fbae36d36f8: i64 = TargetConstantPool<half 0xH4248> 0
    In function: behavior.vector.test.vector @splat
    error: test...
    error: The following command terminated unexpectedly:
    /Users/runner/work/1/s/build/stage3-release/bin/zig test /Users/runner/work/1/s/test/behavior.zig --test-name-prefix behavior-native-ReleaseSmall--multi-default  -OReleaseSmall --cache-dir /Users/runner/work/1/s/zig-cache --global-cache-dir /Users/runner/.cache/zig --name test -fno-single-threaded -I /Users/runner/work/1/s/test -L /Users/runner/zig+llvm+lld+clang-x86_64-macos-none-0.10.0-dev.60+50aa139d1/lib -isystem /Users/runner/zig+llvm+lld+clang-x86_64-macos-none-0.10.0-dev.60+50aa139d1/include --zig-lib-dir /Users/runner/work/1/s/lib --enable-cache 

Next steps:

• use llvm-reduce to create a test case
• file upstream bug report

[fogti]

 * Running ./stage3/bin/zig build test-behavior -Dstatic-llvm=false -Denable-llvm -Dskip-non-native -Doptimize=ReleaseSafe -Dtarget=native -Dcpu=native ...
zig test ReleaseSmall native: error: LLVM ERROR: Cannot select: 0xa1cf330: v8f16,ch = X86ISD::VBROADCAST_LOAD<(load (s16) from constant-pool)> 0x86a13b0, 0xa39b320, vector.zig:305:18 @[ vector.zig:314:25 @[ vector.zig:329:20 ] ]
  0xa39b320: i64 = X86ISD::Wrapper TargetConstantPool:i64<half 0xH4248> 0
    0x5bd5ab0: i64 = TargetConstantPool<half 0xH4248> 0
In function: behavior.vector.test.vector @splat

zig test ReleaseSmall native: error: the following command terminated unexpectedly:
/tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/build/stage3/bin/zig test /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/test/behavior.zig -OReleaseSmall --cache-dir /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/zig-cache --global-cache-dir /tmp/portage/dev-lang/zig-0.11.0/homedir/.cache/zig --name test -I /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/test -I /usr/lib/llvm/16/include --zig-lib-dir /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/lib --listen=- 
zig test ReleaseSmall native: error: LLVM ERROR: Cannot select: 0x91e4010: v8f16,ch = X86ISD::VBROADCAST_LOAD<(load (s16) from constant-pool)> 0x72fd450, 0x8fbef90, vector.zig:305:18 @[ vector.zig:314:25 @[ vector.zig:329:20 ] ]
  0x8fbef90: i64 = X86ISD::WrapperRIP TargetConstantPool:i64<half 0xH4248> 0
    0x8fd8110: i64 = TargetConstantPool<half 0xH4248> 0
In function: behavior.vector.test.vector @splat

zig test ReleaseSmall native: error: the following command terminated unexpectedly:
/tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/build/stage3/bin/zig test /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/test/behavior.zig -lc -OReleaseSmall --cache-dir /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/zig-cache --global-cache-dir /tmp/portage/dev-lang/zig-0.11.0/homedir/.cache/zig --name test -I /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/test -I /usr/lib/llvm/16/include --zig-lib-dir /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/lib --listen=- 
zig test ReleaseSmall native: error: LLVM ERROR: Cannot select: 0x8438c70: v8f16,ch = X86ISD::VBROADCAST_LOAD<(load (s16) from constant-pool)> 0x651de30, 0x8506990, vector.zig:305:18 @[ vector.zig:314:25 @[ vector.zig:329:20 ] ]
  0x8506990: i64 = X86ISD::Wrapper TargetConstantPool:i64<half 0xH4248> 0
    0x84debb0: i64 = TargetConstantPool<half 0xH4248> 0
In function: behavior.vector.test.vector @splat

zig test ReleaseSmall native: error: the following command terminated unexpectedly:
/tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/build/stage3/bin/zig test /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/test/behavior.zig -OReleaseSmall --cache-dir /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/zig-cache --global-cache-dir /tmp/portage/dev-lang/zig-0.11.0/homedir/.cache/zig --name test -fsingle-threaded -I /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/test -I /usr/lib/llvm/16/include --zig-lib-dir /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/lib --listen=- 
Build Summary: 29/36 steps succeeded; 3 failed; 23533/25026 tests passed; 1493 skipped (disable with --summary none)
test-behavior transitive failure
├─ run test behavior-native-ReleaseSmall transitive failure
│  └─ zig test ReleaseSmall native failure
├─ run test behavior-native-ReleaseSmall-libc transitive failure
│  └─ zig test ReleaseSmall native failure
└─ run test behavior-native-ReleaseSmall-single transitive failure
   └─ zig test ReleaseSmall native failure
error: the following build command failed with exit code 1:
/tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/zig-cache/o/b5ee962511f85d81f5639c8a45a0fa81/build /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/build/stage3/bin/zig /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0 /tmp/portage/dev-lang/zig-0.11.0/work/zig-0.11.0/zig-cache /tmp/portage/dev-lang/zig-0.11.0/homedir/.cache/zig test-behavior -Dstatic-llvm=false -Denable-llvm -Dskip-non-native -Doptimize=ReleaseSafe -Dtarget=native -Dcpu=native

this also occurs on
Linux --- 6.4.8-gentoo --- 2023 x86_64 AMD A10-5800K APU with Radeon(tm) HD Graphics AuthenticAMD GNU/Linux