https://bugs.llvm.org/show_bug.cgi?id=38113
Bug ID: 38113
Summary: aliasing pointer analsyis broken with 32-bit pointers
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: AMDGPU
Assignee: unassignedb...@nondot.org
Reporter: airl...@gmail.com
CC: llvm-bugs@lists.llvm.org
radv has just started adding support for KHR_variable_pointers vulkan
extension,
however some tests are crashing in llvm with a "Pointer address space out of
range" error.
This is due to a select on 2 pointers in the 32-bit constant address space (6).
However the code in lib/Target/AMDGPU/AMDGPUAliasAnalysis.cpp checks up to
MAX_COMMON_ADDRESS which is 5 and throws the error for amdgcn. However this
looks like the code hasn't really be updated to handle 32-bit address space
pointers.
https://reviews.llvm.org/D31520
was the change that added this.
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