Add RAY_FLAG_CULL_BACK_FACING_TRIANGLES test#1276
Merged
Merged
Conversation
7 tasks
MarijnS95
force-pushed
the
inlinert-cull-back-face
branch
2 times, most recently
from
05b61fd to
78cfe57
Compare
MarijnS95
added a commit
to Traverse-Research/offload-test-suite
that referenced
this pull request
Jun 3, 2026
Four small tests stacked on top of llvm#1275, each isolating one shader-observable PSO raytracing surface. They follow the same shape as the inline-RT batch already in llvm#1271 / llvm#1272 / llvm#1274 / llvm#1276 — one .test file per behavior, single-purpose shader, exact buffer comparison. - `dispatch-rays-index.test` — 4x1x1 dispatch, raygen writes `DispatchRaysIndex().x` into `Output[index]`. Confirms the dispatch grid plumbs through to the per-lane system value with no BLAS / TLAS / hit groups in play (RT-pipeline-only, no AS binding). - `dispatch-rays-dimensions.test` — 2x3x1 dispatch, raygen packs the constant `DispatchRaysDimensions()` into one uint per lane. Confirms every lane sees the host-side `{W, H, D}` even when only one dimension > 1. - `miss-shader-index.test` — two miss shaders writing distinct sentinels (0xAA / 0xBB). 2-lane dispatch picks `MissShaderIndex` 0 and 1 respectively; rays start far enough from the geometry that every ray misses. Verifies the SBT miss region's per-record routing. - `ray-contribution-to-hit-group-index.test` — two hit groups with distinct closest-hit shaders (0xA1 / 0xB2). 2-lane dispatch picks `RayContributionToHitGroupIndex` 0 and 1, every ray hits the same triangle. Verifies the SBT hit-group region's per-record routing. The first two have no AS / Miss / HitGroup in their pipeline at all — just a raygen + a UAV — which exercises the minimum viable RT pipeline shape (one raygen group, zero-sized miss / hit / callable SBT regions). The latter two reuse the single-triangle BLAS/TLAS from `raygen-roundtrip.test`. All four tests are `# REQUIRES: raytracing-pipeline` with `# XFAIL: Clang` — Clang (`clang-dxc`) doesn't yet lower `[shader("…")]` entry points to either DXIL libraries or SPIR-V. With the Metal RT bring-up rebased on top, all four pass natively on Apple Silicon and Metal is dropped from the XFAIL list. Locally verified end-to-end on the user's Linux box: - Vulkan via the native offloader against an NVIDIA RTX 3060: all four tests PASS. - D3D12 via Wine + vkd3d-proton + the cross-compiled offloader.exe on the same GPU: all four tests PASS. And on macOS 15 / metal-irconverter 3.1.1: - Metal via the native offloader: all four tests PASS. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
MarijnS95
force-pushed
the
inlinert-cull-back-face
branch
from
78cfe57 to
c3fb8cd
Compare
MarijnS95
added a commit
to Traverse-Research/offload-test-suite
that referenced
this pull request
Jun 8, 2026
Four small tests stacked on top of llvm#1275, each isolating one shader-observable PSO raytracing surface. They follow the same shape as the inline-RT batch already in llvm#1271 / llvm#1272 / llvm#1274 / llvm#1276 — one .test file per behavior, single-purpose shader, exact buffer comparison. - `dispatch-rays-index.test` — 4x1x1 dispatch, raygen writes `DispatchRaysIndex().x` into `Output[index]`. Confirms the dispatch grid plumbs through to the per-lane system value with no BLAS / TLAS / hit groups in play (RT-pipeline-only, no AS binding). - `dispatch-rays-dimensions.test` — 2x3x1 dispatch, raygen packs the constant `DispatchRaysDimensions()` into one uint per lane. Confirms every lane sees the host-side `{W, H, D}` even when only one dimension > 1. - `miss-shader-index.test` — two miss shaders writing distinct sentinels (0xAA / 0xBB). 2-lane dispatch picks `MissShaderIndex` 0 and 1 respectively; rays start far enough from the geometry that every ray misses. Verifies the SBT miss region's per-record routing. - `ray-contribution-to-hit-group-index.test` — two hit groups with distinct closest-hit shaders (0xA1 / 0xB2). 2-lane dispatch picks `RayContributionToHitGroupIndex` 0 and 1, every ray hits the same triangle. Verifies the SBT hit-group region's per-record routing. The first two have no AS / Miss / HitGroup in their pipeline at all — just a raygen + a UAV — which exercises the minimum viable RT pipeline shape (one raygen group, zero-sized miss / hit / callable SBT regions). The latter two reuse the single-triangle BLAS/TLAS from `raygen-roundtrip.test`. All four tests are `# REQUIRES: raytracing-pipeline` with `# XFAIL: Clang` — Clang (`clang-dxc`) doesn't yet lower `[shader("…")]` entry points to either DXIL libraries or SPIR-V. With the Metal RT bring-up rebased on top, all four pass natively on Apple Silicon and Metal is dropped from the XFAIL list. Locally verified end-to-end on the user's Linux box: - Vulkan via the native offloader against an NVIDIA RTX 3060: all four tests PASS. - D3D12 via Wine + vkd3d-proton + the cross-compiled offloader.exe on the same GPU: all four tests PASS. And on macOS 15 / metal-irconverter 3.1.1: - Metal via the native offloader: all four tests PASS. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
MarijnS95
force-pushed
the
inlinert-cull-back-face
branch
from
c3fb8cd to
23bfedb
Compare
Two rays at the existing single-triangle BLAS — one from +z (sees the front face per DX / VK / MTL's shared default winding convention) and one from -z (sees the back face) — with the RAY_FLAG_CULL_BACK_FACING_TRIANGLES template flag set. The +z ray must hit and the -z ray must miss. Part of the inline-RT test coverage epic (llvm#1258). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
MarijnS95
force-pushed
the
inlinert-cull-back-face
branch
from
23bfedb to
22cc67a
Compare
manon-traverse
approved these changes
Jun 12, 2026
EmilioLaiso
approved these changes
Jun 15, 2026
EmilioLaiso
pushed a commit
to Traverse-Research/offload-test-suite
that referenced
this pull request
Jun 24, 2026
Four small tests stacked on top of llvm#1275, each isolating one shader-observable PSO raytracing surface. They follow the same shape as the inline-RT batch already in llvm#1271 / llvm#1272 / llvm#1274 / llvm#1276 — one .test file per behavior, single-purpose shader, exact buffer comparison. - `dispatch-rays-index.test` — 4x1x1 dispatch, raygen writes `DispatchRaysIndex().x` into `Output[index]`. Confirms the dispatch grid plumbs through to the per-lane system value with no BLAS / TLAS / hit groups in play (RT-pipeline-only, no AS binding). - `dispatch-rays-dimensions.test` — 2x3x1 dispatch, raygen packs the constant `DispatchRaysDimensions()` into one uint per lane. Confirms every lane sees the host-side `{W, H, D}` even when only one dimension > 1. - `miss-shader-index.test` — two miss shaders writing distinct sentinels (0xAA / 0xBB). 2-lane dispatch picks `MissShaderIndex` 0 and 1 respectively; rays start far enough from the geometry that every ray misses. Verifies the SBT miss region's per-record routing. - `ray-contribution-to-hit-group-index.test` — two hit groups with distinct closest-hit shaders (0xA1 / 0xB2). 2-lane dispatch picks `RayContributionToHitGroupIndex` 0 and 1, every ray hits the same triangle. Verifies the SBT hit-group region's per-record routing. The first two have no AS / Miss / HitGroup in their pipeline at all — just a raygen + a UAV — which exercises the minimum viable RT pipeline shape (one raygen group, zero-sized miss / hit / callable SBT regions). The latter two reuse the single-triangle BLAS/TLAS from `raygen-roundtrip.test`. All four tests are `# REQUIRES: raytracing-pipeline` with `# XFAIL: Clang` — Clang (`clang-dxc`) doesn't yet lower `[shader("…")]` entry points to either DXIL libraries or SPIR-V. With the Metal RT bring-up rebased on top, all four pass natively on Apple Silicon and Metal is dropped from the XFAIL list. Locally verified end-to-end on the user's Linux box: - Vulkan via the native offloader against an NVIDIA RTX 3060: all four tests PASS. - D3D12 via Wine + vkd3d-proton + the cross-compiled offloader.exe on the same GPU: all four tests PASS. And on macOS 15 / metal-irconverter 3.1.1: - Metal via the native offloader: all four tests PASS. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
EmilioLaiso
pushed a commit
to Traverse-Research/offload-test-suite
that referenced
this pull request
Jun 25, 2026
Four small tests stacked on top of llvm#1275, each isolating one shader-observable PSO raytracing surface. They follow the same shape as the inline-RT batch already in llvm#1271 / llvm#1272 / llvm#1274 / llvm#1276 — one .test file per behavior, single-purpose shader, exact buffer comparison. - `dispatch-rays-index.test` — 4x1x1 dispatch, raygen writes `DispatchRaysIndex().x` into `Output[index]`. Confirms the dispatch grid plumbs through to the per-lane system value with no BLAS / TLAS / hit groups in play (RT-pipeline-only, no AS binding). - `dispatch-rays-dimensions.test` — 2x3x1 dispatch, raygen packs the constant `DispatchRaysDimensions()` into one uint per lane. Confirms every lane sees the host-side `{W, H, D}` even when only one dimension > 1. - `miss-shader-index.test` — two miss shaders writing distinct sentinels (0xAA / 0xBB). 2-lane dispatch picks `MissShaderIndex` 0 and 1 respectively; rays start far enough from the geometry that every ray misses. Verifies the SBT miss region's per-record routing. - `ray-contribution-to-hit-group-index.test` — two hit groups with distinct closest-hit shaders (0xA1 / 0xB2). 2-lane dispatch picks `RayContributionToHitGroupIndex` 0 and 1, every ray hits the same triangle. Verifies the SBT hit-group region's per-record routing. The first two have no AS / Miss / HitGroup in their pipeline at all — just a raygen + a UAV — which exercises the minimum viable RT pipeline shape (one raygen group, zero-sized miss / hit / callable SBT regions). The latter two reuse the single-triangle BLAS/TLAS from `raygen-roundtrip.test`. All four tests are `# REQUIRES: raytracing-pipeline` with `# XFAIL: Clang` — Clang (`clang-dxc`) doesn't yet lower `[shader("…")]` entry points to either DXIL libraries or SPIR-V. With the Metal RT bring-up rebased on top, all four pass natively on Apple Silicon and Metal is dropped from the XFAIL list. Locally verified end-to-end on the user's Linux box: - Vulkan via the native offloader against an NVIDIA RTX 3060: all four tests PASS. - D3D12 via Wine + vkd3d-proton + the cross-compiled offloader.exe on the same GPU: all four tests PASS. And on macOS 15 / metal-irconverter 3.1.1: - Metal via the native offloader: all four tests PASS. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
EmilioLaiso
pushed a commit
that referenced
this pull request
Jun 26, 2026
Depends on #1281 ## Summary Four small PSO raytracing tests stacked on top of #1275, each isolating one shader-observable surface from the 👍 list in #1268. Same shape as the inline-RT batch already in flight in #1271 / #1272 / #1274 / #1276 — one `.test` file per behavior, single-purpose shader, exact buffer comparison. - `dispatch-rays-index.test` — 4x1x1 dispatch, raygen writes `DispatchRaysIndex().x` into `Output[index]`. Confirms the dispatch grid plumbs through to the per-lane system value with no BLAS / TLAS / hit groups in play (RT-pipeline-only, no AS binding). - `dispatch-rays-dimensions.test` — 2x3x1 dispatch, raygen packs the constant `DispatchRaysDimensions()` into one uint per lane. Confirms every lane sees the host-side `{W, H, D}` even when only one dimension > 1. - `miss-shader-index.test` — two miss shaders writing distinct sentinels (0xAA / 0xBB). 2-lane dispatch picks `MissShaderIndex` 0 and 1 respectively; rays start far enough from the geometry that every ray misses. Verifies the SBT miss region's per-record routing. - `ray-contribution-to-hit-group-index.test` — two hit groups with distinct closest-hit shaders (0xA1 / 0xB2). 2-lane dispatch picks `RayContributionToHitGroupIndex` 0 and 1, every ray hits the same triangle. Verifies the SBT hit-group region's per-record routing. The first two have no AS / Miss / HitGroup in their pipeline at all — just a raygen + a UAV — which doubles as a regression check for the minimum viable RT pipeline shape (one raygen group, zero-sized miss / hit / callable SBT regions). The latter two reuse the single-triangle BLAS / TLAS from `raygen-roundtrip.test`. All four tests are `# REQUIRES: raytracing-pipeline` with `# XFAIL: Clang` — `clang-dxc` doesn't yet lower `[shader("…")]` entry points to either DXIL libraries or SPIR-V. With the Metal RT bring-up in #1281 rebased underneath this branch, all four pass natively on Apple Silicon and `Metal` is dropped from the XFAIL list. ## Test plan Local on an NVIDIA RTX 3060: - [x] Linux Vulkan (native `offloader`) - [x] Linux D3D12 (Wine + vkd3d-proton + cross-compiled `offloader.exe`) - [ ] Windows Vulkan (native `offloader.exe`) - [ ] Windows D3D12 (native `offloader.exe`) CI (RT-capable runners): - [ ] windows-nvidia D3D12 (`RaytracingTier 1.2`) - [ ] windows-intel VK (`VK_KHR_ray_tracing_pipeline`) - [x] macOS Metal (`supportsRaytracing`) Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Stacks on top of #1232 / #1245. Two rays at the existing single-triangle BLAS — one from +z (sees the front face per the default winding convention all three backends share) and one from -z (sees the back face) — with the
RAY_FLAG_CULL_BACK_FACING_TRIANGLEStemplate flag set. Lane 0 must hit and lane 1 must miss.Independent of the other InlineRT test PRs (#1271, #1272, #1274) — only adds a new test file.
Test plan
Local on an NVIDIA RTX 3060:
offloader)offloader.exe)offloader.exe)offloader.exe)CI (RT-capable runners):
RaytracingTier 1.2)VK_KHR_ray_tracing_pipeline)supportsRaytracing)