[Metal] `sin.32` and `cos.32` tests failing on Macs due to improper handling of NaN, Inf, denorm floats

Nobody has claimed this yet.

The tests `Feature/HLSLLib/cos.32.test` and `Feature/HLSLLib/sin.32.test` are failing on some Apple devices due to improper handling of NaN, Inf, and denorm floats. This happens with and without the `-Gis` compiler flag.

Update: as found while making PR #702, splitting off the NaN, Inf, and denorm into their own test allowed Machine 3 to pass with DXC.

Thus far, we have only the following information to go off of:

Machine 1 - Pass
```
SoC: Apple M1
ProductName: macOS
ProductVersion: TBD
BuildVersion: TBD
metal-irconverter version: TBD
Default triple: TBD
```

Machine 2 - Pass
```
SoC: Apple M2
ProductName: macOS
ProductVersion: TBD
BuildVersion: TBD
metal-irconverter version: TBD
Default triple: TBD
```

Machine 3 - Fail
```
SoC: Apple M3 Max
ProductName: macOS
ProductVersion: 15.6.1
BuildVersion: 24G90
metal-irconverter version: 3.0.5
Default triple: air64-apple-macosx15.0.0
```

Machine 4 - Fail
```
SoC: Apple M4 Pro
ProductName: macOS
ProductVersion: 26.2
BuildVersion: 25C56
metal-irconverter version: 3.0.6
Default triple: air64-apple-macosx15.0.0
```

Logs from Machine 3 (Apple M4 Pro)
- DXC: https://github.com/llvm/offload-test-suite/actions/runs/21608308376/job/62270556528
- Clang: https://github.com/llvm/offload-test-suite/actions/runs/21610376388/job/62277521345

```
FAIL: OffloadTest-mtl :: Feature/HLSLLib/cos.32.test (95 of 333)
******************** TEST 'OffloadTest-mtl :: Feature/HLSLLib/cos.32.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
Using Metal API
Created compute commands.

--
Command Output (stderr):
--
/Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/split-file /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/OffloadTest/test/Feature/HLSLLib/cos.32.test /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp # RUN: at line 67
+ /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/split-file /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/OffloadTest/test/Feature/HLSLLib/cos.32.test /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp
"/Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/DXC/build/bin/dxc-3.7" -metal -T cs_6_5 -Fo /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp.o /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp/source.hlsl # RUN: at line 68
+ /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/DXC/build/bin/dxc-3.7 -metal -T cs_6_5 -Fo /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp.o /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp/source.hlsl
/Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/offloader -debug-layer /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp/pipeline.yaml /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp.o # RUN: at line 69
+ /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/offloader -debug-layer /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp/pipeline.yaml /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/cos.32.test.tmp.o
2026-02-02 14:12:24.612 offloader[6949:12977065] *** -[NSAutoreleasePool addObject:]: Do not use this instance method on specific pools -- just use -autorelease instead.
Test failed: Test1
Comparison Rule: BufferFloatEpsilon
Epsilon: 0.0008
Expected:
---
Name: ExpectedOut
Format: Float32
Stride: 16
Data: [ nan, nan, 1, 1, 1, 1, nan, 1, 1, nan, nan, nan ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Got:
---
Name: Out
Format: Float32
Stride: 16
Data: [ 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0 ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Full Hex 64bit representation of Expected Buffer Values:
[ nan, nan, 0x1p+0, 0x1p+0, 0x1p+0, 0x1p+0, nan, 0x1.fffff6p-1, 0x1.fffff6p-1, nan, nan, nan ]
Full Hex 64bit representation of Actual Buffer Values:
[ 0x0p+0, 0x0p+0, 0x1p+0, 0x1p+0, 0x1p+0, 0x1p+0, 0x0p+0, 0x1.fffff4p-1, 0x1.fffff4p-1, 0x0p+0, 0x0p+0, 0x0p+0 ]

--

********************
...
FAIL: OffloadTest-mtl :: Feature/HLSLLib/sin.32.test (195 of 333)
******************** TEST 'OffloadTest-mtl :: Feature/HLSLLib/sin.32.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
Using Metal API
Created compute commands.

--
Command Output (stderr):
--
/Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/split-file /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/OffloadTest/test/Feature/HLSLLib/sin.32.test /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp # RUN: at line 67
+ /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/split-file /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/OffloadTest/test/Feature/HLSLLib/sin.32.test /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp
"/Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/DXC/build/bin/dxc-3.7" -metal -T cs_6_5 -Fo /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp.o /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp/source.hlsl # RUN: at line 68
+ /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/DXC/build/bin/dxc-3.7 -metal -T cs_6_5 -Fo /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp.o /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp/source.hlsl
/Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/offloader -debug-layer /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp/pipeline.yaml /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp.o # RUN: at line 69
+ /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/offloader -debug-layer /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp/pipeline.yaml /Users/admin/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/sin.32.test.tmp.o
2026-02-02 14:12:25.710 offloader[7387:12978540] *** -[NSAutoreleasePool addObject:]: Do not use this instance method on specific pools -- just use -autorelease instead.
Test failed: Test1
Comparison Rule: BufferFloatEpsilon
Epsilon: 0.0008
Expected:
---
Name: ExpectedOut
Format: Float32
Stride: 16
Data: [ nan, nan, -0, -0, 0, 0, nan, -0.00073464, 0.00073464,
nan, nan, nan ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Got:
---
Name: Out
Format: Float32
Stride: 16
Data: [ 0, 0, -1.12e-38, -0, 0, 1.12e-38, 0, -0.000738303, 0.000738303,
0, 0, 0 ]
OutputProps:
Height: 0
Width: 0
Depth: 0
...
Full Hex 64bit representation of Expected Buffer Values:
[ nan, nan, -0x0p+0, -0x0p+0, 0x0p+0, 0x0p+0, nan, -0x1.8129bap-11, 0x1.8129bap-11, nan, nan, nan ]
Full Hex 64bit representation of Actual Buffer Values:
[ 0x0p+0, 0x0p+0, -0x1.e7d42cp-127, -0x0p+0, 0x0p+0, 0x1.e7d42cp-127, 0x0p+0, -0x1.83155ap-11, 0x1.83155ap-11, 0x0p+0, 0x0p+0, 0x0p+0 ]

--

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

Start with Feature/HLSLLib/cos.32.test and Feature/HLSLLib/sin.32.test, then reproduce the Metal failures using the DXC and offloader commands shown in the logs. Compare NaN, Inf, and denorm results on the affected Apple devices; done means the relevant cases pass consistently, including when separated as described in the update.

Written by the indexing model from the issue text.