database/postgres
database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-04-27 22:56:53 +03:00
Code

Fix illegal attribute propagation in LLVM JIT.

Browse Source 
Commit 72559438 started copying more attributes from AttributeTemplate
to the functions we generate on the fly.  In the case of deform
functions, which return void, this meant that "noundef", from
AttributeTemplate's return value (a Datum) was copied to a void type.
Older LLVM releases were OK with that, but LLVM 18 crashes.

Update our llvm_copy_attributes() function to skip copying the attribute
for the return value, if the target function returns void.

Thanks to Dmitry Dolgov for help chasing this down.

Back-patch to all supported releases, like 72559438.

Reported-by: Pavel Stehule <pavel.stehule@gmail.com>
Reviewed-by: Dmitry Dolgov <9erthalion6@gmail.com>
Discussion: https://postgr.es/m/CAFj8pRACpVFr7LMdVYENUkScG5FCYMZDDdSGNU-tch%2Bw98OxYg%40mail.gmail.com
This commit is contained in:
Thomas Munro 2024-04-10 10:46:15 +12:00
parent 1435cc87d3
commit 7fe32eaa4a
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/backend/jit/llvm/llvmjit.c
View File

@ -565,8 +565,11 @@ llvm_copy_attributes(LLVMValueRef v_from, LLVMValueRef v_to)
/* copy function attributes */
llvm_copy_attributes_at_index(v_from, v_to, LLVMAttributeFunctionIndex);
/* and the return value attributes */
llvm_copy_attributes_at_index(v_from, v_to, LLVMAttributeReturnIndex);
if (LLVMGetTypeKind(LLVMGetFunctionReturnType(v_to)) != LLVMVoidTypeKind)
{
/* and the return value attributes */
llvm_copy_attributes_at_index(v_from, v_to, LLVMAttributeReturnIndex);
}
/* and each function parameter's attribute */
param_count = LLVMCountParams(v_from);