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ac/llvm: fix image_samples with null descriptors

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Fixes various dEQP-VK.robustness.robustness2.* tests.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13251>
This commit is contained in:
Rhys Perry 2021-10-07 19:34:41 +01:00 • committed by Marge Bot
parent ee1f0451a8
commit 2564fbfc57
1 changed files with 12 additions and 0 deletions
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12
src/amd/llvm/ac_nir_to_llvm.c
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@ -2837,6 +2837,18 @@ static LLVMValueRef visit_image_samples(struct ac_nir_context *ctx, nir_intrinsi
LLVMValueRef rsrc = get_image_descriptor(ctx, instr, dynamic_index, AC_DESC_IMAGE, false);
LLVMValueRef ret = ac_build_image_get_sample_count(&ctx->ac, rsrc);
if (ctx->abi->robust_buffer_access) {
LLVMValueRef dword1, is_null_descriptor;
/* Extract the second dword of the descriptor, if it's
* all zero, then it's a null descriptor.
*/
dword1 =
LLVMBuildExtractElement(ctx->ac.builder, rsrc, LLVMConstInt(ctx->ac.i32, 1, false), "");
is_null_descriptor = LLVMBuildICmp(ctx->ac.builder, LLVMIntEQ, dword1,
LLVMConstInt(ctx->ac.i32, 0, false), "");
ret = LLVMBuildSelect(ctx->ac.builder, is_null_descriptor, ctx->ac.i32_0, ret, "");
}
return exit_waterfall(ctx, &wctx, ret);
}