aco: requires Exact for p_jump_to_epilog

Otherwise, in presence of p_exit_early_if the main FS will always
jump to the PS epilog regardless the exact mask.

This fixes dEQP-VK.draw.renderpass.shader_invocation.helper_invocation
and few vkd3d-proton regressions when PS epilogs are forced.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17617>

src/amd/compiler/aco_insert_exec_mask.cpp

@@ -99,7 +99,11 @@ needs_exact(aco_ptr<Instruction>& instr)
    } else if (instr->isFlatLike()) {
       return instr->flatlike().disable_wqm;
    } else {
-      return instr->isEXP();
+      /* Require Exact for p_jump_to_epilog because if p_exit_early_if is
+       * emitted inside the same block, the main FS will always jump to the PS
+       * epilog without considering the exec mask.
+       */
+      return instr->isEXP() || instr->opcode == aco_opcode::p_jump_to_epilog;
    }
 }