| Bug ID | 93447 |
|---|---|
| Summary | [r600g] llvm crash because of use of uninitialized stack |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/r600 |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | notasas@gmail.com |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 120595 [details] hack patch When replaying traces from Bug 92229 with R600_DEBUG=llvm specified a crash will occur (on my system) in LLVMBuildInsertElement() because uninitialized value in Index argument is passed. That value originates from radeon_llvm_emit_prepare_cube_coords() function's coords[3] stack variable. At that time, opcode = TGSI_OPCODE_TEX target = TGSI_TEXTURE_CUBE so nothing ever sets coords[3], which is copied to the caller and eventually finds it way to llvm. Unfortunately I don't have any knowledge about that code, I hope somebody who knows more can take a look. A hack patch is attached but it's most likely wrong.
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