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gallivm: Add a debug variable for the exec mask

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Makes it show up in GDB.

Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28613>
This commit is contained in:
Konstantin Seurer 2025-03-01 22:09:10 +01:00 • committed by Marge Bot
parent 3f5a576c9e
commit 83cac4e7e9
1 changed files with 27 additions and 0 deletions
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27
src/gallium/auxiliary/gallivm/lp_bld_nir_soa.c
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@ -191,6 +191,9 @@ struct lp_build_nir_soa_context
nir_shader *shader;
nir_instr *instr;
/* A variable that contains the value of mask_vec so it shows up inside the debugger. */
LLVMValueRef debug_exec_mask;
struct lp_build_if_state if_stack[LP_MAX_TGSI_NESTING];
uint32_t if_stack_size;
@ -5598,6 +5601,8 @@ visit_block(struct lp_build_nir_soa_context *bld, nir_block *block)
LLVMMetadataRef di_loc = LLVMDIBuilderCreateDebugLocation(
gallivm->context, debug_info->nir_line, 1, gallivm->di_function, NULL);
LLVMSetCurrentDebugLocation2(gallivm->builder, di_loc);
LLVMBuildStore(gallivm->builder, mask_vec(bld), bld->debug_exec_mask);
}
switch (instr->type) {
@ -5996,6 +6001,28 @@ void lp_build_nir_soa_func(struct gallivm_state *gallivm,
ralloc_free(shader_src);
}
LLVMValueRef exec_mask = mask_vec(&bld);
bld.debug_exec_mask = lp_build_alloca_undef(gallivm, LLVMTypeOf(exec_mask), "exec_mask");
LLVMBuildStore(gallivm->builder, exec_mask, bld.debug_exec_mask);
LLVMMetadataRef di_type = lp_bld_debug_info_type(gallivm, LLVMTypeOf(exec_mask));
LLVMMetadataRef di_var = LLVMDIBuilderCreateAutoVariable(
gallivm->di_builder, gallivm->di_function, "exec_mask", strlen("exec_mask"),
gallivm->file, 0, di_type, true, LLVMDIFlagZero, 0);
LLVMMetadataRef di_expr = LLVMDIBuilderCreateExpression(gallivm->di_builder, NULL, 0);
LLVMMetadataRef di_loc = LLVMDIBuilderCreateDebugLocation(
gallivm->context, 0, 0, gallivm->di_function, NULL);
#if LLVM_VERSION_MAJOR >= 19
LLVMDIBuilderInsertDeclareRecordAtEnd(gallivm->di_builder, bld.debug_exec_mask, di_var, di_expr, di_loc,
LLVMGetInsertBlock(gallivm->builder));
#else
LLVMDIBuilderInsertDeclareAtEnd(gallivm->di_builder, bld.debug_exec_mask, di_var, di_expr, di_loc,
LLVMGetInsertBlock(gallivm->builder));
#endif
}
nir_foreach_reg_decl(reg, impl) {